2016

Stability of High-Density Two-Dimensional Excitons against a Mott Transition in High Magnetic Fields Probed by Coherent Terahertz Spectroscopy
Zhang, Y. Wang, W. Gao, Z. Long, J. D. Watson, M. J. Manfra, A. Belyanin, and J. Kono
Physical Review Letters 117, 207402 (2016) [PDF]

Electron-Hole Asymmetric Chiral Breakdown of Reentrant Quantum Hall States
A. V. Rossokhaty, Y. Baum, J. A. Folk, J. D. Watson, G. C. Gardner, and M. J. Manfra
Physical Review Letters 117, 166805 (2016) [PDF]

Notch filtering the nuclear environment of a spin quit
F. K. Malinowski, F. Martins, P. D. Nissen, E. Barnes, Ł. Cywiński, M. S. Rudner, S. Fallahi, G. C. Gardner, M. J. Manfra, C. M. Marcus, and F. Kuemmeth
Nature Nanotechnology (2016) DOI:10.1038/nnano.2016.170

Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells
S. Wang, D. Scarabelli, Y. Y. Kuznetsova, S. J. Wind, A. Pinczuk, V. Pellegrini, M. J. Manfra, G. C. Gardner, L. N. Pfeiffer, and K. W. West
Applied Physics Letters 109, 113101 (2016) [PDF]

Collective non-perturbative coupling of 2D electrons with high-quality-factor terahertz cavity photons
Q. Zhang, M. Lou, X. Li, J. L. Reno,W. Pan, J. D.Watson, M. J. Manfra, and J. Kono
Nature Physics (2016) DOI: 10.1038/NPHYS3850

Decoupling Edge Versus Bulk Conductance in the Trivial Regime of an InAs/GaSb Double Quantum Well Using Corbino Ring Geometry
B. M. Nguyen, A. A. Kiselev, Ramsey Noah, Wei Yi, Fanming Qu, A. J. A. Beukman,
F. K. de Vries, J. van Veen, S. Nadj-Perge, L. P. Kouwenhoven, M. Kjaergaard, H. J. Suominen, F. Nichele, C. M. Marcus, M. J. Manfra, and M. Sokolich
Physical Review Letters 117, 077701 (2016) [PDF]

Edge transport in the trivial phase of InAs/GaSb
F. Nichele, H. J Suominen, M. Kjaergaard, C. M. Marcus, E. Sajadi, J. A. Folk, F. Qu, A. J. A. Beukman, F. K. de Vries, J. van Veen, S. Nadj-Perge, L. P Kouwenhoven, B. M. Nguyen, A. A. Kiselev, W. Yi, M. Sokolich, M. J Manfra, E. M. Spanton, and K. A. Moler
New Journal of Physics 18, 083005 (2016) [PDF]

Resistively detected high-order magnetoplasmons in a high-quality two-dimensional electron gas
Q. Shi, M. A. Zudov, L. N. Pfeiffer, K. W. West, J. D. Watson, and M. J. Manfra
Physical Review B 93, 165438 (2016) [PDF]

Dramatic enhancement of near-infrared intersubband absorption in c-plane AlInN/GaN
superlattices

M. Shirazi-HD, K. Turkmeneli, S. Liu, S. Dai, C. Edmunds, J. Shao, G. C. Gardner, D. N. Zakharov, M. J. Manfra,
and O. Malis
Applied Physics Letters 108, 121108 (2016) [PDF]

Evidence for a new symmetry breaking mechanism reorienting quantum Hall nematics
Q. Shi, M. A. Zudov, J. D. Watson, G. C. Gardner, and M. J. Manfra
Physical Review B 93, 121411(R) (2016) [PDF]

Noise Suppression Using Symmetric Exchange Gates in Spin Qubits
F. Martins, F. K. Malinowski, P. D. Nissen, E. Barnes, S. Fallahi, G. C. Gardner, M. J. Manfra, C. M. Marcus, and F. Kuemmeth
Physical Review Letters 116, 116801 (2016) [PDF]

Reorientation of quantum Hall stripes within a partially filled Landau level
Q. Shi, M. A. Zudov, J. D. Watson, G. C. Gardner, and M. J. Manfra
Physical Review B 93, 121404(R) (2016) [PDF]

Observation of a transition from a topologically ordered to a spontaneously broken symmetry phase
N. Samkharadze, K. A. Schreiber, G. C. Gardner, M. J. Manfra, E. Fradkin & G. A. Csáthy
Nature Physics 12 (2016) DOI: 10.1038/NPHYS3523

Modified MBE hardware and techniques and role of gallium purity for attainment of two dimensional electron gas mobility > 35 x 10 6 cm2/V s in AlGaAs/GaAs quantum wells grown by MBE
G. C.Gardner, S. Fallahi, J. D.Watson, and M. J. Manfra
Journal of Crystal Growth 441,71–77 (2016) [PDF]

Optical Emission Spectroscopy Study of Competing Phases of Electrons in the Second Landau Level
A. L. Levy, U. Wurstbauer, Y. Y. Kuznetsova, A. Pinczuk, L. N. Pfeiffer, K.W. West, M. J. Manfra, G. C. Gardner, and J. D. Watson
Physical Review Letters 116, 016801 (2016) [PDF]

2015

Gapped excitations of unconventional fractional quantum Hall effect states in the second Landau level
U. Wurstbauer, A. L. Levy, A. Pinczuk, K. W. West, L. N. Pfeiffer, M. J. Manfra, G. C. Gardner, and J. D. Watson
Physical Review B 92, 241407 (2015) [PDF]

Coherent vertical electron transport and interface roughness effects in AlGaN/GaN intersubband devices
A Grier, A. Valavanis, C. Edmunds, J. Shao, J. D. Cooper, G. Gardner, M. J. Manfra, O. Malis, D. Indjin, Z. Ikonic, and P. Harrison
Journal of Applied Physics 118, 224308 (2015) [PDF]

Fabrication of artificial graphene in a GaAs quantum heterostructure
D. Scarabelli, S. Wang, A. Pinczuk, S. J. Wind, Y. Y. Kuznetsova, L. N. Pfeiffer, K. West, G.C. Gardner, M. J. Manfra and V. Pellegrini
Journal of Vacuum Science and Technology B 33, 06FG03 (2015) [PDF]

In-surface confinement of topological insulator nanowire surface states
F.W. Chen, L. A. Jauregui, Y. H. Tan, M. J.  Manfra, G. Klimeck, Y. P. Chen, and T. Kubis
Applied Physics Letters 107,  121605  (2015) [PDF]

Transport of a sliding Wigner crystal in the four flux composite fermion regime
C. Zhang, R. R. Du, M. J. Manfra, L. N. Pfeiffer, and K. W. West
Physical Review B 92, 075434   (2015) [PDF]

Shubnikov-de Haas oscillations in a two-dimensional electron gas under subterahertz radiation
Q. Shi, P. D. Martin, A. T. Hatke, M. A. Zudov, J. D. Watson, G. C. Gardner, M. J. Manfra, L. N. Pfeiffer and K. W. West
Physical Review B 92, 081405 (2015) [PDF]

Electric and Magnetic Tuning Between the Trivial and Topological Phases in InAs/GaSb Double Quantum Wells
F. M. Wu, A. J. A. Beukman, S. Nadj-Perge, M. Wimmer, B.M. Nguyen, W. Yi, J. Thorp, M. Sokolich, A. A. Kiselev, M. J. Manfra, C. M. Marcus, and L. P. Kouwenhoven
Physical Review Letters 115, 036803 (2015) [PDF]

Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures
Zhong Wan, Aleksandr Kazakov, Michael J. Manfra
Nature Communications 6, 7426 (2015) [PDF]

Gate-tunable high mobility remote-doped InSb/In1-xAlxSb quantum well heterostructures
W. Yi, A. A. Kiselev, J. Thorp, R. Noah, B. M. Nguyen, S. Bui, R. D. Rajavel, T. Hussain, M. F. Gyure, P. Kratz, Q. Qian, M. J. Manfra, V. S. Pribiag, L. P. Kouwenhoven, C. M. Marcus, and M. Sokolich
Applied Physics Letters 106, 142103 (2015) [PDF]

Impact of Heterostructure Design on Transport Properties in the Second Landau Level
of In Situ Back-Gated Two-Dimensional Electron Gases

J. D. Watson, G. A. Csáthy, and M. J. Manfra
Physical Review Applied 3, 064004 (2015) [PDF]

Cryogenic Control Architecture for Large-Scale Quantum Computing
J. M. Hornibrook, J. I. Colless, I. D. Conway Lamb, S. J. Pauka, H. Lu, A. C. Gossard, J. D. Watson, G. C. Gardner, S. Fallahi, M. J. Manfra, and D. J. Reilly
Physical Review Applied 3, 024010 (2015) [PDF]

Inversion-mode GaAs wave-shaped field-effect transistor on GaAs (100) substrate
J. Zhang, X. Lou, M. Si, H. Wu, J. Shao, M. J. Manfra, R. G. Gordon, and P.D. Ye
Applied Physics Letters 106, 073506 (2015) [PDF]


2014

Multiphoton processes at cyclotron resonance subharmonics in a two-dimensional electron system
under dc and microwave excitation
S. Chakraborty, A. T. Hatke, L. W. Engel, J. D. Watson, and M. J. Manfra
Physical Review  B 90, 195437 (2014) [PDF]

Field-effect-induced two-dimensional electron gas utilizing modulation-doped ohmic contacts
S. Mondal, G. C. Gardner, J. D. Watson, S. Fallahi, A. Yacoby, M. J. Manfra
Solid State Communications 197, 20–24 (2014) [PDF]

Low-temperature illumination and annealing of ultrahigh quality quantum wells
M. Samani, A. V. Rossokhaty, E. Sajadi, S. Lüscher, J. A. Folk, J. D. Watson, G. C. Gardner, and M. J. Manfra
Physical Review B 90, 121405(R) (2014) [PDF]

Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases
Q. Zhang, T. Arikawa, E. Kato, J. L. Reno, W. Pan, J. D. Watson, M. J. Manfra, M. A. Zudov, M. Tokman, M. Erukhimova, A. Belyanin, and J. Kono
Physical Review Letters 113, 047601 (2014) [PDF]

Terahertz intersubband absorption in non-polar m-plane AlGaN/GaN quantum wells
C. Edmunds, J. Shao, M. Shirazi-HD, M. J. Manfra, and O. Malis
Appl. Phys. Lett. 105, 021109 (2014) [PDF]

Impact of short-range scattering on the metallic transport of strongly correlated two-dimensional holes in GaAs quantum wells
N. J. Goble, J. D. Watson, M. J. Manfra, and X. P. A. Gao
Physical Review B 90, 035310 (2014) [PDF]

Surface topography and chemistry shape cellular behavior on wide band-gap semiconductors
L. E. Bain, R. Collazo, S. Hsu, N. Pfiester Latham, M. J. Manfra, A. Ivanisevic
Acta Biomaterialia, 10 6, 2455-2462 (2014) [PDF]

Full control of quadruple quantum dot circuit charge states in the single electron regime
M. R. Delbecq, T. Nakajima, T. Otsuka, S. Amaha, J. D. Watson, M. J. Manfra, and S. Tarucha
Appl. Phys. Lett. 104, 183111 (2014) [PDF]

ν=5/2 Fractional Quantum Hall State in the Presence of Alloy Disorder
N. Deng, G. C. Gardner, S. Mondal, E. Kleinbaum, M. J. Manfra, and G. A. Csáthy
Physical Review Letters 112, 116804 (2014) [PDF]

Quantum band engineering of nitride semiconductors for infrared lasers
O. Malis,  C. Edmunds, D. Li,, J. Shao,  G. Gardner,  W. Li,  P. Fay,  and M. J. Manfra
Proc. SPIE 9002, Novel In-Plane Semiconductor Lasers XIII, 90021D (2014) [PDF]

Molecular Beam Epitaxy of Ultra-High-Quality AlGaAs/ GaAs Heterostructures: Enabling Physics in Low-Dimensional Electronic Systems
M. J. Manfra
Annu. Rev. Condens.Matter Phys. 5:347–73 (2014) [PDF]


2013

Comparative study of intersubband absorption in AlGaN/GaN and AlInN/GaN superlattices: Impact of material inhomogeneities
C. Edmunds, L. Tang, M. Cervantes, M. Shirazi-HD, J. Shao,  A. Grier, A. Valavanis, J. D. Cooper, D. Li, G. Gardner, D. N. Zakharov, Z. Ikonic,  D. Indjin, P. Harrison, M. J. Manfra, and O. Malis
Physical Review B 88, 235206 (2013) [PDF]

Homogeneous AlGaN/GaN superlattices grown on free-standing (1 100) GaN substrates by plasma-assisted molecular beam epitaxy
J. Shao, D. N. Zakharov, C. Edmunds, O. Malis, and M. J. Manfra
Appl. Phys. Lett.103, 232103 (2013) [PDF]

Growth and electrical characterization of Al0.24Ga0.76As/AlxGa1−xAs/Al0.24Ga0.76 As modulation-doped quantum wells with extremely low x
G. C. Gardner, J. D. Watson, S. Mondal, N. Deng, G. A. Csáthy, and M. J. Manfra
Appl. Phys. Lett. 102, 252103 (2013) [PDF]

Temperature-dependence of negative differential resistance in GaN/AlGaN resonant tunneling structures
D. Li, J. Shao, L. Tang, C. Edmunds, G. Gardner, M. J. Manfra and O. Malis
Semicond. Sci. Technol. 28, 074024 (2013)  [PDF]

Evidence for effective mass reduction in GaAs/AlGaAs quantum wells
A.T. Hatke, M. A. Zudov, J.D. Watson, M. J. Manfra, L.N. Pfeiffer, and K.W. West
Physical Review B 87, 161307(R) (2013) [PDF]

Effects of forming gas anneal on ultrathin InGaAs nanowire metal-oxide semiconductor field-effect transistors
M. Si, J. J. Gu, X. Wang, J. Shao, X. Li, M. J. Manfra, R. G. Gordon, and P. D. Ye.
Appl. Phys. Lett. 102, 093505 (2013) [PDF]

Physisorption of functionalized gold nanoparticles on AlGaN/GaN highelectron mobility transistors for sensing applications
M. S. Makowski, S. Kim, M. Gaillard, D. Janes, M. J. Manfra, I. Bryan, Z. Sitar, C. Arellano, J. Xie, R. Collazo, and A. Ivanisevic
Appl. Phys. Lett. 102, 074102 (2013) [PDF]

Strong heavy-to-light hole intersubband absorption in the valence band of carbon-doped GaAs/AlAs superlattices
M. I. Hossain, Z. Ikonic, J. Watson, J. Shao, P. Harrison, M. J. Manfra, and O. Malis.
J. Appl. Phys. 113, 053103 (2013) [PDF]


2012

Near-infrared absorption in lattice-matched AlInN/GaN and Strained AlGaN/GaN heterostructures grown by MBE on low-defect GaN substrates
C. Edmunds, L. Tang, M. Cervantes, G. Gardner, T. Paskova, M. J. Manfra, and O. Malis.
Journal of Electronic Materials 41 5, 881-886 (2012) [PDF]

Exploration of the limits to mobility in two-dimensional hole systems in GaAs/AlGaAs quantum wells
J. D. Watson, S. Mondal, G. Gardner, G. Csathy,and  M. J. Manfra.
Physical Review B 85, 165301 (2012) [PDF]

Magnetoplasmon resonance in a two-dimensional electron system driven into a zero-resistance state
A. T. Hatke, M. A. Zudov, J. D. Watson, and  M. J. Manfra.
Physical Review B 85, 121306(R) (2012) [PDF]

Collective Nature of the Reentrant Integer Quantum Hall States in the Second Landau Level
N. Deng, A. Kumar, M. J. Manfra, L. N. Pfeiffer, K. W. West, and G. Csathy.
Physical Review Letters108, 086803 (2012) [PDF]

Gallium nitride is biocompatible and non-toxic before and after functionalization with peptides
S. A. Jewett, M. S. Makowski, B. Andrews, M. J. Manfra, and A. Ivanisevic.
ACTA BIOMATERIALIA 8, 728-733 (2012) [PDF]

Millimeter wave transmission spectroscopy of gated two-dimensional hole systems
K. Stone, R. R. Du, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Applied Physics Letters 100, 192104 (2012) [PDF]

Improvement of near-infrared absorption line width in AlGaN/GaN superlattices by optimization of delta-doping location
C. Edmunds, L. Tang, J. Shao, D. Li, M. Cervantes.
Appl. Phys. Lett.101, 102104 (2012) [PDF]

Contrasting energy scales of the reentrant integer quantum Hall states
N. Deng, J. D. Watson, L. P. Rokhinson, M. J. Manfra, and G. A. Csathy.
Phys. Rev. B 86, 201301(R) (2012) [PDF]

Repeatable low-temperature negative-differential resistance fromAl0.18Ga0.82N/GaN resonant tunneling diodes grown by molecular-beam-epitaxy on free-standing GaN substrates
D. Li, L. Tang, C. Edmunds, J. Shao, G. Gardner.
Appl. Phys. Lett. 100, 252105 (2012) [PDF]


2011

Quantitative analysis of the disorder broadening and the intrinsic gap for the ν=5/2 fractional quantum Hall state
N. Samkharadze, J. D. Watson, G. Gardner, M. J. Manfra, L. N. Pfeiffer, K. W. West, and G. Csathy.
Physical Review B 84, 121305 (2011) [PDF]

Scattering mechanisms in a high-mobility low-density carbon-doped (100) GaAs two-dimensional hole system
J. D. Watson, S. Mondal, G. A. Csathy, M. J. Manfra, E. H. Hwang, S. Das Sarma, L. N. Pfeiffer, and K. W. West.
Physical Review B 83, 241305(R) (2011) [PDF]

Particle-hole asymmetry of fractional quantum Hall states in the second Landau level of a two-dimensional hole system
A. Kumar, N. Samkharadze, G. A. Csathy, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Physical Review B 83, 201305(R) (2011) [PDF]

Integrated electronic transport and thermometry at milliKelvin temperatures and in strong magnetic fields
N. Samkharadze, A. Kumar, M. J. Manfra, L. N. Pfeiffer, K. W. West, and G. A. Csathy.
Review of Scientific Instruments 82, 053902 (2011) [PDF]

Effect of Strain on Stripe Phases in the Quantum Hall Regime
S. P. Koduvayur, Y. Lyanda-Geller, S. Khlebnikov, G. Csathy, M. J. Manfra, L. N. Pfeiffer, K. W. West, L. P. Rokhinson.
Physical Review Letters 106, 016804 (2011) [PDF]


2010

Nonconventional odd-denominator fractional quantum Hall states in the second Landau level
A. Kumar, G. A. Csathy, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Physical Review Letters 105, 246898 (2010) [PDF]

Intersubband transitions in lattice-matched AlInN/GaN heterostructures
O. Malis, C. Edmunds, D. H. Li, and M. J. Manfra.
2010 18th Biennial University/Government/Industry Micro-Nano Symposium. (2010)

2009

Magnetotransport in Zener tunneling regime in a high-mobility two-dimensional hole gas
Y. Dai, Z. Q. Yuan, C. L. Yang, R. R. Du, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Physical Review B 80, 041310(R) (2009) [PDF]

Near-infrared intersubband absorption in molecular-beam epitaxy-grown lattice-matched InAlN/GaN superlattices
O. Malis, C. Edmunds, M. J. Manfra, and D. L. Sivco.
Applied Physics Letters 94, 161111 (2009) [PDF]

Landau level spectrum in a two-dimensional hole gas in C-doped (100) GaAs/AlGaAs square quantum well
Z. Q. Yuan, R. R. Du, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Applied Physics Letters 94, 052103 (2009) [PDF]


2008

Cyclotron mass of two-dimensional holes in (100) oriented GaAs/AlGaAs heterostructures
T. M. Lu, Z. F. Li, D. C. Tsui, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Applied Physics Letters 92, 012109 (2008) [PDF]


2007

Transport and percolation in a low-density high-mobility two-dimensional hole system
M. J. Manfra, E. H. Hwang, S. Das Sarma, L. N. Pfeiffer, K. W. West, and A. M. Sergent.
Physical Review Letters 99, 236402 (2007) [PDF]

Confinement of fractional quantum Hall states in narrow conducting channels
R. L. Willett, M. J. Manfra, L.N. Pfeiffer, and K.W. West.
Applied Physics Letters 91, 052105 (2007) [PDF]

Mesoscopic structures and two-dimensional hole systems in fully field effect controlled heterostructures
R. L. Willett, M. J. Manfra, L. N. Pfeiffer, and K. W. West.
Applied Physics Letters 91, 033510 (2007) [PDF]

Impact of spin-orbit coupling on quantum Hall nematic phases
M. J. Manfra, R. de Picciotto, Z. Jiang, S. H. Simon, L. N. Pfeiffer, K. W. West, and A. M. Sergent.
Physical Review Letters 98, 206804 (2007) [PDF]

Density and well width dependencies of the effective mass of two-dimensional holes in (100) GaAs quantum wells measured using cyclotron resonance at mircowave frequencies
H. Zhu, K. Lai, D. C. Tsui, S. P. Bayrakci, N. P. Ong, M. Manfra, L. Pfeiffer, and K. West.
Solid State communications 141, 510-513 (2007) [PDF]

Optimized growth of lattice-matched InAlN/GaN heterostructures by molecular beam epitaxy
S. Schmult, T. Siegrist, A. M. Sergent, M. J. Manfra, and R. J. Molnar.
Applied Physics Letters 90, 021922 (2007) [PDF]

High quality UV AlGaN/AlGaN distributed Bragg reflectors and microcavities
O. Mitrofanov, S. Schmult, M. J. Manfra, T. Siegrist, N. G. Weimann, A. M. Sergent, and R. J. Molnar.
SPIE Vol. 6473, 64731G (2007) [PDF]

Charge trapping on defects in AlGaN/GaN field effect transistors
O. Mitrofanov and M. J. Manfra.
SPIE 6473, 64731M (2007) [PDF]


2006

Splitting of the cyclotron resonance in two-dimensional electron systems
E. A. Henriksen, S. Syed, Y. J. Wang, M. J. Manfra, L. N. Pfeiffer, K. W. West, and H. L. Stormer.
Physica E 34 1-2, 318-320 (2006) [PDF]

Single-electron transistors in GaN/AlGaN heterostructures
H. T. Chou, D. Goldhaber-Gordon, S. Schmult, M. J. Manfra, A. M. Sergent, R. J. Molnar.
Applied Physics Letters 89, 033104 (2006) [PDF]

Large Bychkov-Rashba spin-orbit coupling in high-mobility GaN/AlxGa1-xN heterostructures
S. Schmult, M. J. Manfra, A. Punnoose, A. M. Sergent, K. W. Baldwin, and R. J. Molnar.
Physical Review B 74, 033302 (2006) [PDF]

Quantum transport in high mobility AlGaN/GaN 2DEGs and nanostructures
S. Schmult, M. J. Manfra, A. M. Sergent, A. Punnoose, H. T. Chou, D. Goldhaber-Gordon, and R. J. Molnar.
Physica Status Solidi B 243 7, 1706-1712 (2006) [PDF]

High-reflectivity ultraviolet AlGaN/AlGaN distributed Bragg reflectors
O. Mitrofanov, S. Schmult, M. J. Manfra, T. Siegrist, N. G. Weimann, A. M. Sergent, and R. J. Molnar.
Applied Physical Letters 88, 171101 (2006) [PDF]


2005

Acoustic phonon scattering in a low density, high mobility AlGaN/GaN field-effect transistor
E. A. Henriksen, S. Syed, Y. Ahmadian, M. J. Manfra, K. W. Baldwin, A. M. Sergent, R. J. Molnar, and H. L. Stormer.
Applied Physics Letters 86, 252108 (2005) [PDF]

High mobility two-dimensional hole system in GaAs/AlGaAs quantum wells grown on (100) GaAs substrates
M. J. Manfra, L. N. Pfeiffer, K. W. West, R. de Picciotto, and K. W. Baldwin.
Applied Physics Letters 86, 162106 (2005) [PDF]

High-quality quantum point contacts in GaN/AlGaN heterostructures
H. T. Chou, S. Luscher, D. Goldhaber-Gordon, M. J. Manfra, A. M. Sergent, K. W. West, and R. J. Molnar.
Applied Physics Letters 86, 073108 (2005) [PDF]


2004

Large cyclotron-resonance line splitting of two-dimensional electrons in AlGaN/GaN and AlGaAs/GaAs heterostructures
S. Syed, Y. J. Wang, H. L. Stormer, M. J. Manfra, L. N. Pfeiffer, K. W. West, and R. Molnar.
International Journal of Modern Physics B 18 27, 3761-3768 (2004) [PDF]

Electron mobility exceeding 160000 cm2/V s in AlGaN/GaN heterostructures grown by molecular-beam epitaxy
M. J. Manfra, K. W. Baldwin, A. M. Sergent, K. W. West, R. J. Molnar, and J. Caissie.
Applied Physics Letters 85, 22 5394-5396 (2004) [PDF]

Quantum and transport lifetimes in a tunable low-density AlGaN/GaN two-dimensional electron gas
M. J. Manfra, S. H. Simon, K. W. Baldwin, A. M. Sergent, K. W. West, R. J. Molnar, and J. Caissie.
Applied Physics Letters 85, 22 5278-5280 (2004) [PDF]

Electron mobility in very low density GaN/AlGaN/GaN heterostructures
M. J. Manfra, K. W. Baldwin, A. M. Sergent, R. J. Molnar, and J. Caissie.
Applied Physics Letters 85, 10 1722-1724 (2004) [PDF]

Poole-Frenkel electron emission from the traps in AlGaN/GaN transistors
O. Mitrofanov and M. J. Manfra.
Journal of Applied Physics 95, 11 6414-6419 (2004) [PDF]

Electron scattering in AlGaN/GaN structures
S. Syed, M. J. Manfra, Y. J. Wang, R. J. Molnar, and H. L. Stormer.
Applied Physics Letters 84 9, 1507-1509 (2004) [PDF]

Dynamics of trapped charge in GaN/AlGaN/GaN high electron mobility transistors grown by plasma-assisted molecular beam epitaxy
O. Mitrofanov and M. J. Manfra.
Applied Physics Letters84 3, 422-424 (2004) [PDF]


2003

Nonparabolicity of the conduction band of wurtzite GaN
S. Syed, J. B. Heroux, Y. J. Wang, M. J. Manfra, R. J. Molnar, and H. L. Stormer.
Applied Physics Letters 83 22, 4553-4555 (2003) [PDF]

Effect of dislocations on local transconductance in AlGaN/GaN heterostructures as imaged by scanning gate microscopy
J. W. P. Hsu, N. G. Weimann, M. J. Manfra, K. W. West, D. V. Lang, F. F. Schrey, O. Mitrofanov, and R. J. Molnar.
Applied Physics Letters 83 22, 4559-4561 (2003) [PDF]

High power GaN/AlGaN/GaN HEMTs operating at 2 to 25 GHz grown by plasma-assisted MBE
M. J. Manfra, N. G. Weimann, O. Mitrofanov, T. Waechtler, and D. M. Tennant.
Physica Status Solidi A-Applied Research 200 1, 175-178 (2003) [PDF]

Mechanisms of gate lag in GaN/AlGaN/GaN high electron mobility transistors
O. Mitrofanov and M. J. Manfra.
Superlattices and Microstructures 34 1-2, 33-53 (2003) [PDF]

Large splitting of the cyclotron-resonance line in AlxGa1-xN/GaN heterostructures
S. Syed, M. J. Manfra, Y. J. Wang, H. L. Stormer, and R. J. Molnar.
Physical Review B 64, 241304 (2003)

Impact of Si doping on radio frequency dispersion in unpassivated GaN/AlGaN/GaN high-electron-mobility transistors grown by plasma-assisted molecular-beam epitaxy
O. Mitrofanov, M. J. Manfra, and N. Weimann.
Applied Physics Letters 82 24, 4361-4363 (2003) [PDF]

Unpassivated AlGaN/GaN HEMTs with CW power density of 3.2 W/mm at 25 GHz grown by plasma-assisted MBE
M. J. Manfra, N. Weimann, Y. Baeyens, P. Roux, and D. M. Tennant.
Electronic Letters 39 8, 694-695 (2003) [PDF]

Unpassivated AlGaN-GaN HEMTs with minimal RF dispersion grown by plasma-assisted MBE on semi-insulating 6H-SiC substrates
N. G. Weimann, M. J. Manfra, and T. Wachtler.
IEEE Electron Device Letters 24 2, 57-59 (2003) [PDF]


2002

AlGaN/GaN HEMTs grown by molecular beam epitaxy on sapphire, 6H-SiC, and HVPE-GaN templates
N. G. Weimann, M. J. Manfra, J. W. P. Hsu, K. Baldwin, L. N. Pfeiffer, W. West, S. N. G. Chu, D. V. Lang, and R. J. Molnar.
Compound Semiconductors 2002 174, 223-226 (2002) [PDF]

Submicron AlGaN/GaN HEMTs with very high drain current density grown by plasma-assisted MBE on 6H-SiC
N. G. Weimann, M. J. Manfra, S. Chakraborty, and D. A. Tennant.
IEEE Electron Device Letters 23 12, 691-693 (2002) [PDF]

Dislocation and morphology control during molecular-beam epitaxy of AlGaN/GaN heterostructures directly on sapphire substrates
M. J. Manfra, N. G. Weimann, J. W. P. Hsu, L. N. Pfeiffer, K. W. West, and S. N. G. Chu.
Applied Physics Letters 81 8, 1456-1458 (2002) [PDF]

Direct imaging of reverse-bias leakage through pure screw dislocations in GaN films grown by molecular beam epitaxy on GaN templates
J. W. P. Hsu, M. J. Manfra, R. J. Molnar, B. Heying, and J. S. Speck.
Applied Physics Letters 81 1, 79-81 (2002) [PDF]

High mobility AlGaN/GaN heterostructures grown by plasma-assisted molecular beam epitaxy on semi-insulating GaN templates prepared by hydride vapor phase epitaxy
M. J. Manfra, N. G. Weimann, J. W. P. Hsu, L. N. Pfeiffer, K. W. West, S. Syed, H. L. Stormer, W. Pan, D. V. Lang, S. N. G. Chu, G. Kowach, A. M. Sergent, J. Caissie, K. M. Molvar, L. J. Mahoney, and R. J. Molnar.
Journal of Applied Physics 92 1, 338-345 (2002) [PDF]

AlGaN/GaN HEMTs grown by molecular beam epitaxy on sapphire, SiC, and HVPE GaN templates
N.G. Weimann, J. W. P. Hsu, K. Baldwin, L. N. Pfeiffer, K. W. West, S. N. G. Chu, D. V. Lang, and R. J. Molnar.
IEEE Lester Eastman Conference on High Performance Devices, 126-133 (2002) [PDF]


2001

Effect of growth stoichiometry on the electrical activity of screw dislocations in GaN films grown by molecular-beam epitaxy
J. W. P. Hsu, M. J. Manfra, S. N. G. Chu, C. H. Chen, L. N. Pfeiffer, and R. J. Molnar.
Applied Physics Letters 78 25, 3980-3982 (2001) [PDF]

Inhomogeneous spatial distribution of reverse bias leakage in GaN Schottky diodes
J. W. P. Hsu, M. J. Manfra, D. V. Lang, S. Richter, S. N. G. Chu, A. M. Sergent, R. N. Kleinman, L. N. Pfeiffer, and R. J. Molnar.
Applied Physics Letters 78 12, 1685-1687 (2001) [PDF]

Surface morphology and electronic properties of dislocations in AlGaN/GaN heterostructures
J. W. P. Hsu, M. J. Manfra, D. V. Lang, K. W. Baldwin, L. N. Pfeiffer, and R. J. Molnar.
Journal of Electronic Materials 30 3, 110-114 (2001) [PDF]


2000

High-mobility AlGaN/GaN heterostructures grown by molecular-beam epitaxy on GaN templates prepared by hydride vapor phase epitaxy
M. J. Manfra, L. N. Pfeiffer, K. W. West, H. L. Stormer, K. W. Baldwin, J. W. P. Hsu, D. V. Lang, and R. J. Molnar.
Applied Physics Letters 77 18, 2888-2890 (2000) [PDF]

Absorption spectroscopy in electron double layers: evidence for broken symmetry states
M. J. Manfra, B. B. Goldberg, J. C. Pniower, A. Pinczuk, V Pelligrini, L. N. Pfeiffer, and K. W. West.
Physica A 6 1-4, 590-593 (2000) [PDF]


1998

Absorption spectroscopy of charged spin texture excitations at ν=1
B. B. Goldberg, M. J. Manfra, L. Pfeiffer, and K. West.
Physica B 251, 7-14 (1998) [PDF]

Anderson-Fano resonance and shake-up processes in the magnetophotoluminescence of a two-dimensional electron system
M. J. Manfra, B. B. Goldberg, L. Pfeiffer, and K. West.
Physical Review B 57 16, R9467-R9470 (1998) [PDF]


1997

Optical determination of the spin polarization of a quantum Hall ferromagnet
M. J. Manfra, B. B. Goldberg, L. Pfeiffer, and K. West.
Physica E 1 1-4, 28-35 (1997) [PDF]

Skyrmions and the ν=1 quantum Hall ferromagnet
M. J. Manfra, B. B. Goldberg, L. Pfeiffer, and K. West.
Acta Physica Polonica A 92 4, 621-632 (1997)


1996

Temperature dependence of the spin polarization of a quantum Hall ferromagnet
M. J. Manfra, E. H. Aifer, B. B. Goldberg, D. A. Broido, L. Pfeiffer, and K. West.
Physical Review B 54 24, 17327-17330 (1996) [PDF]


1994

Reactive ion etching of GaN thin-films
M. Manfra, S. Berkowitz, R. Molnar, A. Clark, T. D. Moustakas, and W. J. Skocpol.
Diagnostic Techniques for Semiconductor Materials Processing 324, 477-480 (1994) [PDF]