2024
Ultraclean two-dimensional hole systems with mobilities exceeding 10^7 cm^2/Vs
Adbhut Gupta, C. Wang, S. K. Singh, K. W. Baldwin, R. Winkler, M. Shayegan, and L. N. Pfeiffer
Phys. Rev. Materials 8, 014004 (2024).
2023
Gate-defined two-dimensional hole and electron systems in an undoped InSb quantum well
Zijin Lei, Erik Cheah, Filip Krizek, Ruediger Schott, Thomas Baehler, Peter Maerki, Werner Wegscheider, Mansour Shayegan, Thomas Ihn, and Klaus Ensslin
Phys. Rev. Research 5, 013117 (2023).
Valley-Tunable Even-Denominator Fractional Quantum Hall State in the Lowest Landau Level of an Anisotropic System
Md. Shafayat Hossain, Meng K. Ma, Y. J. Chung, S. K. Singh, A. Gupta, K. W. West, K. W. Baldwin, L. N. Pfeiffer, R. Winkler, and M. Shayegan
Phys. Rev. Lett. 130, 126301 (2023). [Editor's Suggestion]
Delocalization and Universality of the Fractional Quantum Hall Plateau-to-Plateau Transitions
P. T. Madathil, K. A. Villegas Rosales, C. T. Tai, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 130, 226503 (2023).
Highly Anisotropic Even-Denominator Fractional Quantum Hall State in an Orbitally Coupled Half-Filled Landau Level
Chengyu Wang, A. Gupta, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan
Phys. Rev. Lett. 131, 056302 (2023).
Moving crystal phases of a quantum Wigner solid in an ultra-high-quality 2D electron system
P. T. Madathil, K. A. Villegas Rosales, Y. J. Chung, K. W. West, K. W. Baldwin, L. N. Pfeiffer, L. W. Engel, and M. Shayegan
Phys. Rev. Lett. 131, 236501 (2023). [Editor's Suggestion; Featured in Physics]
Next-generation Even-denominator Fractional Quantum Hall States of Interacting Composite Fermions
Chengyu Wang, A. Gupta, P. T. Madathil, S. K. Singh, Y. J. Chung, L. N. Pfeiffer, K. W. Baldwin, and M. Shayegan
Proc. National Academy of Sciences (PNAS) 120, e2314212120 (2023).
Fractional Quantum Hall State at Filling Factor v = 1/4 in a System with Severe Landau Level Mixing
Chengyu Wang, A. Gupta, S. K. Singh, P. T. Madathil, Y. J. Chung, L. N. Pfeiffer, K. W. Baldwin, R. Winkler, and M. Shayegan
Phys. Rev. Lett. 131, 266502 (2023).
2022
Correlated States of 2D Electrons near the Landau Level Filling v = 1/7
Yoon Jang Chung, D. Graf, L. W. Engel, K. A. Villegas Rosales, P. T. Madathil,K. W. Baldwin, K. W. West, L. N. Pfeiffer, and M. Shayegan
Phys. Rev. Lett. 128, 026802 (2022).
Record-quality GaAs two-dimensional hole systems
Yoon Jang Chung, C. Wang, S. K. Singh, A. Gupta, K. W. Baldwin, K. W. West, M. Shayegan, L. N. Pfeiffer, and R. Winkler
Phys. Review Materials 6, 034005 (2022).
Wigner crystals in flatland 2D electron systems, Comment
M. Shayegan
Nature Reviews (Physics) 4, 213 (2022).
Composite Fermion Mass: Experimental measurements in ultrahigh quality two-dimensional electron systems
K. A. Villegas Rosales, P. T. Madathil, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B 106 (Letter) L041301 (2022).
Anisotropic Two-dimensional, Disordered Wigner Solid
Md. S. Hossain, M. K. Ma, K. A. Villegas-Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 129, 036601 (2022).
Featured in Physics: Squeezing a Wigner Solid
by Allison Gasparini, Physics 15, s93 (2022).
Commentary: Evidence of a new type of disordered quantum Wigner Solid
by Ingrid Fadelli (Phys.org) on August 3, 2022
Understanding limits to mobility in ultra-high-mobility GaAs two-dimensional electron systems: The quest for 100 million cm2/Vs and beyond
Yoon Jang Chung, A. Gupta, K. W. Baldwin, K. W. West, M. Shayegan, and L. N. Pfeiffer
Phys. Rev. B 106, 075134 (2022).
Even-denominator fractional quantum Hall state at filling factor v = 3/4
Chengyu Wang, A. Gupta, S. K. Singh, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan
Phys. Rev. Lett. 129, 156801 (2022). [Editors' Suggestion]
Featured in Physics: An Exotic Fractional Quantum Hall State
by Rachel Berkowitz, Physics 15, s134 (2022).
Robust Quantum Hall Ferromagnetism near a Gate-tuned v = 1 Landau Level Crossing
Meng Ma, Chengyu Wang, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan
Phys. Rev. Lett. 129, 196801 (2022).
Fractional quantum Hall valley ferromagnetism in the extreme quantum limit
Md. Shafayat Hossain, Meng K. Ma, Y. J. Chung, S. K. Singh, A. Gupta, K. W. West, K. W. Baldwin, L. N. Pfeiffer, R. Winkler, and M. Shayegan
Phys. Rev. B 106, L201303 (2022).
2021
Bloch Ferromagnetism of Composite Fermions
Md. Shafayat Hossain, Tongzhou Zhao, Songyang Pu, M. A. Mueed, M. K. Ma, K. A. V. Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. K. Jain, and M. Shayegan
Nature Physics 17, 48 (2021).
Competition between fractional quantum Hall liquid and Wigner solid at small fillings: Role of layer thickness and Landau level mixing
K. A. Villegas Rosales, S. K. Singh, Meng K. Ma, Md. Shafayat Hossain, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Research 3, 013181 (2021).
Local signatures of electron-electron scattering in an electronic cavity
Carolin Gold, Beat A. Brm, Richard Steinacher, Tobias Krhenmann, Andrea Hofmann, Christian Reichl, Werner Wegscheider, Mansour Shayegan, Klaus Ensslin, and Thomas Ihn
Phys. Rev. Research 3, 013287 (2021).
Ultra-high-quality two-dimensional electron systems
Yoon Jang Chung, K. A. Villegas Rosales, K. W. Baldwin, P. T. Madathil, K. W. West, M. Shayegan, L. N. Pfeiffer
Nature Materials 20, 632 (2021).
Fractional Quantum Hall Effect Energy Gaps: Role of Electron Layer Thickness
K. A. Villegas Rosales, P. T. Madathil, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 127, 056801 (2021). [Editor's Suggestion]
Spontaneous Valley Polarization of Itinerant Electrons
Md. S. Hossain, M. K. Ma, K. A. Villegas-Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 127, 116601 (2021).
Melting phase diagram of bubble phases in high Landau levels
K. A. Villegas Rosales, S. K. Singh, H. Deng, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B 104 (letter), L121110 (2021).
2020
Observation of spontaneous ferromagnetism in a two-dimensional electron system
M. S. Hossain, M. K. Ma, K. A. Villegas Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
PNAS 117 (51) 32244-32250 (2020).
Spin Reversal of a Quantum Hall Ferromagnet at a Landau Level Crossing
M. Lupatini, P. Knueppel, S. Faelt, R. Winkler, M. Shayegan, A. Imamoglu, and W. Wegscheider
Phys. Rev. Lett. 125, 067404 (2020).
Precise Experimental Test of the Luttinger Theorem and Particle-hole Symmetry for a Strongly Correlated Fermionic System
Md. Shafayat Hossain, M. A. Mueed, M. K. Ma, K. A. V. Rosales, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 125, 046601 (2020). [Editor's Suggestion]
Heterostructure Design to Achieve High-quality, High-density, GaAs 2D Electron System with g-factor Tending to Zero
Yoon Jang Chung, K. W. Baldwin, K. W. West, M. Shayegan, L. N. Pfeiffer, S. Yuan, and Yang Liu
Appl. Phys. Lett. 117, 022102 (2020).
Thermal and Quantum Melting Phase Diagrams for a Magnetic-field-induced Wigner Solid
Meng K. Ma, K. A. Villegas Rosales, H. Deng, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 125, 036601 (2020).
Probing Composite Fermions Near Half-filled Landau Levels
M. Shayegan
Review article in Fractional Quantum Hall Effects: New Developments, edited by B. I. Halperin and J. K. Jain (World Scientific, 2020), pp. 133-181.
Working Principles of Doping-well Structures for High-mobility Two-dimensional Electron Systems
Yoon Jang Chung, K. A. Villegas Rosales, K. W. Baldwin, K. W. West, M. Shayegan, and L. N. Pfeiffer
Phys. Rev. Materials 4, 044003 (2020).
2019
Geometric Resonance of Four-flux Composite Fermions
Md. Shafayat Hossain, Meng K. Ma, M. A. Mueed, D. Kamburov, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan
Phys. Rev. B (Rapid Communications) 100, 041112(R) (2019).
Probing the Melting of a Two-dimensional Quantum Wigner Crystal via its Screening Efficiency
H. Deng, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 122, 116601 (2019). [Editor's Suggestion.]
Wigner Solid Pinning Modes Tuned by Fractional Quantum Hall States of a Nearby Layer
A. T. Hatke, H. Deng, Yang Liu, L. W. Engel, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan
Science Advances 5, eaao2848 (2019).
Spatial Mapping of Local Density Variations in GaAs Two-dimensional Electron Systems Using Photoluminescence
Yoon Jang Chung, K. W. Baldwin, K. W. West, N. Haug, J. van de Wetering, M. Shayegan, and L. N. Pfeiffer
Nano Letters 19, 1908 (2019).
Negative Longitudinal Magnetoresistance in GaAs Quantum Wells
Jing Xu, Meng K. Ma, Maksim Sultanov, Zhi-Li Xiao, Yong-Lei Wang, Dafei Jin, Yang-Yang Lyu, Wei Zhang, Loren N. Pfeiffer, Ken W. West, Kirk W. Baldwin, Mansour Shayegan, and Wai-Kwong Kwok
Nature Communications 10, 287 (2019).
2018
Unconventional Anisotropic Even-denominator Fractional Quantum Hall State in a System with Mass Anisotropy
Md. Shafayat Hossain, Meng K. Ma, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 121, 256601 (2018). [Editor's Suggestion.]
Wigner Solids of Wide Quantum Wells near Landau Filling v = 1
A. T. Hatke, Yang Liu, L. W. Engel, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B 98, 195309 (2018).
Critical Filling Factor for the Formation of a Quantum Wigner Crystal Screened by a Nearby Layer
H. Deng, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B (Rapid Communications) 98, 081111 (R) (2018).
Anomalous Coupling between Magnetic and Nematic Orders in Quantum Hall Systems
Md. Shafayat Hossain, M. A. Mueed, Meng K. Ma, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B (Rapid Communications) 98, 081190 (R) (2018). [Editor's Suggestion.]
Realization of a Valley Superlattice
M. A. Mueed, Md. Shafayat Hossain, I. Jo, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 121, 036802 (2018). [Editor's Suggestion.]
Multivalley Two-dimensional Electron System with Mobility Exceeding 10^6 cm^2V^-1s^-1
Yoon Jang Chung, K. A. Villegas Rosales, H. Deng, K. W. Baldwin, K. W. west, M. Shayegan, and L. N. Pfeiffer
Phys. Rev. Materials (Rapid Communications) 2, 071001 (R) (2018).
Direct Observation of Composite Fermions and Their Fully Spin Polarized Fermi Sea near nu = 5/2
Md. Shafayat Hossain, Meng K. Ma, M. A. Mueed, L. N. Pfeiffer, K. W. West, K. W. baldwin, and M. Shayegan
Phys. Rev. Lett. 120, 256601 (2018). [Editor's Suggestion.]
Surface Segregation and the Al Problem in GaAs Quantum Wells
Yoon Jang Chung, K. W. Baldwin, K. W. West, M. Shayegan and L. N. Pfeiffer
Phys. Rev. Materials 2, 034006 (2018).
Evidence for Cyclotron Orbits of Composite Fermions in the Fractional Quantum Hall Regime
Insun Jo, Hao Deng, Yang Liu, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 120, 016803 (2018). [Editor's Suggestion.]
2017
Observation of Fractional Quantum Hall Effect in an InAs Quantum Well
Meng K. Ma, M. S. Hossain, K. A. Villegas Rosales, H. Deng, T. Tschirky, W. Wegscheider, and M. Shayegan
Phys. Rev. B (Rapid Communications) 96, 241301 (R) (2017)
Interaction-induced interlayer Chage Transfer in the Extreme Quantum Limit
H. Deng, Y. Liue, I. Jo, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B (Rapid Communications) 96, 081102 (R) (2017)
Design Rules for Modulation-doped AlAs Quantum Wells
Yoon Jang Chung, K. W. Baldwin, K. W. West, D. Kamburov, M. Shayegan, and L. N. Pfeiffer
Phys. Rev. Materials (Rapid Communications) 1, 021002 (R) (2017)
Tuning of Fermi Contour Anisotropy in GaAs (001) 2D Holes via Strain
Insun Jo, M. A. Mueed, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, Medini Padmanabhan, and M. Shayegan
Appl. Phys. Lett. 110, 252103 (2017)
Transference of Fermi Contour Anisotropy to Composite Fermions
Insun Jo, K. A. Villegas Rosales, M. A. Mueed, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, Medini Padmanabhan, and M. Shayegan
Phys. Rev. Lett. 119, 016402 (2017)
Search for Composite Fermions at Filling Factor 5/2: Role of Landau Level and Subband Index
M. A. Mueed, D. Kamburov, Md. Shafayat Hossain, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan
Phys. Rev. B 95, 165438 (2017)
Microwave Spectroscopic Observation of a Wigner Solid within the 1/2 Fractional Quantum Hall Effect
A.T. Hatke, Yang Liu, L.W. Engel, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. B 95, 045417 (2017)
Signatures of an Annular Fermi Sea
Insun Jo, Yang Liu, L.N. Pfeiffer, K.W. West, K.W. Baldwin, M. Shayegan, and R. Winkler
Phys. Rev. B 95, 035103 (2017)
2016
Interplay between Quantum Well Width and Interface Roughness for Electron Transport Mobility in GaAs Quantum Wells
D. Kamburov, K.W. Baldwin, K.W. West, M. Shayegan, and L.N. Pfeiffer
Appl. Phys. Lett. 109, 232105 (2016)
Morphing of 2D Hole Systems at ? = 3/2 in Parallel Magnetic Fields: Compressible, Stripe, and Fractional Quantum Hall Phases
Yang Liu, M.A. Mueed, Md. Shafayat Hossain, S. Hasdemir, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. B 94, 155312 (2016)
Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States
M.A. Mueed, D. Kamburov, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 117, 246801 (2016). [Editor’s Suggestion.]
Observation of an Anisotropic Wigner Crystal
Yang Liu, S. Hasdemir, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 117, 106802 (2016)
Commensurability Oscillations of Composite Fermions Induced by the Periodic Potential of a Wigner Crystal
H. Deng, Yang Liu, I. Jo, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 117, 096601 (2016). [Featured in Physics; Editor’s Suggestion.]
Reorientation of the Stripe Phase of 2D Electrons by a Minute Density Modulation
M.A. Mueed, Md. Shafayat Hossain, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. Lett. 117, 076803 (2016). [Editor’s Suggestion.]
Anisotropic Composite Fermions and Fractional Quantum Hall Effect
M.A. Mueed, D. Kamburov, S. Hasdemir, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. B 93, 195436 (2016)
2015
Multicomponent Fractional Quantum Hall States with Subband and Spin Degrees of Freedom
Yang Liu, S. Hasdemir, J. Shabani, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. B 92 (Rapid Communications), 201101(R) (2015)
Unusual Landau Level Pinning and Correlated v = 1 Quantum Hall Effect in Hole Systems Confined to Wide GaAs Quantum Wells
Yang Liu, S. Hasdemir, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. B 92, 195156 (2015)
Composite Fermions with a Warped Fermi Contour
M.A. Mueed, D. Kamburov, Yang Liu, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler
Phys. Rev. Lett. 114, 176805 (2015)
Splitting of the Fermi Contour of Quasi-2D Electrons in Parallel Magnetic Fields
M.A. Mueed, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler
Phys. Rev. Lett. 114, 236404 (2015) [Editor's Suggestion.]
Geometric Resonance of Composite Fermions Near the ν = 1/2 Fractional Quantum Hall State
M.A. Mueed, D. Kamburov, S. Hasdemir, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett. 114, 236406 (2015)
Microwave spectroscopy of the low-filling-factor bilayer electron solid in a wide quantum well
A.T. Hatke, Yang Liu, L.W. Engel, M. Shayegan, L.N. Pfeiffer, K.W. West and K. W. Baldwin
Nature Communications 6, 7071 (2015).
ν = 1/2 Fractional Quantum Hall Effect in Titled Magnetic Fields
S. Hasdermir, Yang Liu, H. Deng, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. B 91, 045113 (2015)
2014
Fractional Quantum Hall Effect and Wigner Crystal of Interacting Composite Fermions
Yang Liu, D. Kamburov, S. Hasdemir, M. Shayegan, L.N. Pfeifer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett. 113, 246803 (2014)
Determination of Fermi Contour and Spin Polarization of ν = 3/2 Composite Fermions via Ballistic Commensurability Measurements
D. Kamburov, M. A. Mueed, I. Jo, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler
Phys. Rev. B 90, 235108 (2014)
What Determines the Fermi Wave Vector of Composite Fermions
D. Kamburov, Yang Liu, M.A. Mueed, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett. 113, 196801 (2014)
Spin Polarization of Composite Fermions and Particle-hole Symmetry Breaking
Yang Liu, S. Hasdemir, A. Wojs , J.K. Jain, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan
Phys. Rev. B 90, 085301 (2014)
Even-denominator Fractional Quantum Hall Effect at a Landau Level Crossing
Yang Liu, S. Hasdemir, A.L. Graninger, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler
Phys. Rev. B 89, 165313 (2014)
Microwave Spectroscopic Observation of Distinct Electron Solid Phases in Wide Quantum Wells
A.T. Hatke, Yang Liu, B. A. Magill, B.H. Moon, L.W. Engel, M. Shayegan, L.N. Pfeiffer, K.W. West, and K. W. Baldwin
Nature Communications 5, 4154 (2014)
Fractional Quantum Hall Effect at ν = 1/2 in Hole Systems Confined to GaAs Quantum Wells
Yang Liu, A.L. Graninger, S. Hasdemir, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler
Phys. Rev. Lett. 112, 046804 (2014)
Fermi Contour Anisotropy of GaAs Electron-Flux Composite Fermions in Parallel Magnetic Fields
D. Kamburov, M.A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, R. Winkler
Phys. Rev. B 89, 085304 (2014)
2013
Phase Diagrams for the Stability of the ν = 1/2 Fractional Quantum Hall Effect in Electron Systems Confined to Symmetric, Wide GaAs Quantum Wells
J. Shabani, Y. Liu, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. B 88, 245413 (2013)
Anisotropic Fermi Contour of (001) GaAs Electrons in Parallel Magnetic Fields
D. Kamburov, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler
Phys. Rev. B 88, 125435 (2013)
Evidence for a ν = 5/2 Fractional Quantum Hall Nematic State in Parallel Magnetic Fields
Yang Liu, S. Hasdemir, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin
Phys. Rev. B 88, 035307 (2013)
Composite Fermions with Tunable Fermi Contour Anisotropy
D. Kamburov, Yang Liu, M. Shayegan, R. Winkler, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett. 110, 206801 (2013)
Spin and Charge Distribution Symmetry Dependence of Stripe Phases in Two-Dimensional Electron Systems Confined to Wide Quantum Wells
Yang Liu, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, and K. Baldwin
Phys. Rev. B 87, 075314 (2013)
2012
Anisotropic Fermi Contour of (001) GaAs Holes in Parallel Magnetic Fields
D. Kamburov, M. Shayegan, R. Winkler, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. B 86, 241302(R) (2012)
Commensurability Oscillations of Hole-flux Composite Fermions
D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett. 109, 236401 (2012)
Ballistic Transport of (001) GaAs 2D Holes through a Strain-induced Lateral Superlattice
D. Kamburov, H. Shapourian, M. Shayegan, L.N. Pfeiffer, K.W. West, K. Baldwin, and R. Winkler
Phys. Rev. B 85, 121305(R) (2012)
Unequal layer densities in bilayer Wigner crystal at high magnetic fields
Zhihai Wang, Yong P. Chen, Han Zhu, L.W. Engel, D.C. Tsui, E. Tutuc, and M. Shayegan
Phys. Rev. B., 85, 195408 (2012)
Observation of Reentrant Quantum Hall States in the Lowest Landau Level
Yang Liu, C.G. Pappas, M. Shayegan, L.N. Pfeiffer, K.W. West, and K. Baldwin
Phys. Rev. Lett. 109, 036801 (2012)
2011
Evolution of the ν = 7/2 Fractional Quantum Hall State in Two-Subband Systems
Yang Liu, J. Shabani, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett., 107, 266802 (2011)
Reentrant ν = 1 Quantum Hall State in a Two-Dimensional Hole System
A.L. Graninger, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler
Phys. Rev. Lett., 107, 176810 (2011)
Imaging of Coulomb-Driven Quantum Hall Edge States
Keji Lai, Worasom Kundhikanjana, Michael A. Kelly, Zhi-Xun Shen, Javad Shabani, and Mansour Shayegan
Phys. Rev. Lett., 107, 176809 (2011)
Effective mass and spin susceptibility of dilute two-dimensional holes in GaAs
YenTing Chiu, Medini Padmanabhan, T. Gokmen, J. Shabani, E. Tutuc, M. Shayegan, and R. Winkler
Phys. Rev. B, 84, 155459 (2011)
Anomalous Robustness of the ν = 5/2 Fractional Quantum Hall State near a Sharp Phase Boundary
Yang Liu, D. Kamburov, M. Shayegan, L.N. Pfeiffer, K.W. West, and K.W. Baldwin
Phys. Rev. Lett., 107, 176805 (2011)
Stability of the q/3 fractional quantum Hall states
Yang Liu, J. Shabani, and M. Shayegan
Phys. Rev. B, 84, 195303 (2011)
2010
Fractional Quantum Hall Effect at High Fillings in a Two-Subband Electron System
J. Shabani, Y. Liu, and M. Shayegan
Phys. Rev. Lett., 105, 246805 (2010)
Transference of transport anisotropy to composite fermions
T. Gokmen, M. Padmanabhan, and M. Shayegan
Nature Physics 6, 621-624 (2010)
Temperature Dependence of Piezoresistance of Composite Fermions with a Valley Degree of Freedom
T. Gokmen, M. Padmanabhan, and M. Shayegan
Solid State Commun. 150, 1165-1168 (2010)
Contrast between spin and valley degrees of freedom
T. Gokmen, M. Padmanabhan, and M. Shayegan
Phys. Rev. B, 81, 235305 (2010)
Composite fermion valley polarization energies: Evidence for particle-hole asymmetry
M. Padmanabhan, T. Gokmen, and M. Shayegan
Phys. Rev. B 81, 113301 (2010)
Density and strain dependence of ν = 1 energy gap in a valley-degenerate AlAs quantum well
T. Gokmen, and M. Shayegan
Phys. Rev. B 81, 115336 (2010)
Composite Fermion Valley Polarization Energies: Evidence for Particle-hole Asymmetry
M. Padmanabhan, T. Gokmen, and M. Shayegan
Phys. Rev. B 81, 113301 (2010)
Ferromagnetic Fractional Quantum Hall States in a Valley Degenerate Two-Dimensional Electron System
M. Padmanabhan, T. Gokmen, and M. Shayegan
Phys. Rev. Lett. 104, 016805 (2010)