69 citations · 409 across the 16 of their papers we have counts for
16 papers
Dynamic Response of Wigner Crystals
Lili Zhao, Wenlu Lin, Yoon Jang Chung +4
The Wigner crystal, an ordered array of electrons, is one of the very first proposed many-body phases stabilized by the electron-electron interaction. This electron solid phase has…
Capacitive Response of Wigner Crystals at the Quantum Hall Plateau
Lili Zhao, Wenlu Lin, Y. J. Chung +3
In this report, we study ultra-high-mobility two-dimensional (2D) electron/hole systems with high precision capacitance measurement. We find that the capacitance charge appears onl…
Dynamic ordering transitions in charged solid
Jian Sun, Jiasen Niu, Yifan Li +5
The phenomenon of group motion is common in nature, ranging from the schools of fish, birds and insects, to avalanches, landslides and sand drift. If we treat objects as collective…
Heterostructure design to achieve high quality, high density GaAs 2D electron system with -factor tending to zero
Yoon Jang Chung, S. Yuan, Yang Liu +4
Hydrostatic pressure is a useful tool that can tune several key parameters in solid state materials. For example, the Landé -factor in GaAs two-dimensional electron systems (2DE…
Cyclotron Orbits of Composite Fermions in the Fractional Quantum Hall Regime
Insun Jo, Hao Deng, Yang Liu +4
We study a bilayer GaAs hole system that hosts two distinct many-body phases at low temperatures and high perpendicular magnetic fields. The higher-density (top) layer develops a F…
Observation of An Anisotropic Wigner Crystal
Yang Liu, S. Hasdemir, L. N. Pfeiffer +3
We report a new correlated phase of two-dimensional charged carriers in high magnetic fields, manifested by an anisotropic insulating behavior at low temperatures. It appears near…
Composite Fermions with a Warped Fermi Contour
M. A. Mueed, D. Kamburov, Yang Liu +5
Via measurements of commensurability features near Landau filling factor , we probe the shape of the Fermi contour for hole-flux composite fermions confined to a wide GaAs q…
Fractional Quantum Hall Effect and Wigner Crystal of Two-Flux Composite Fermions
Yang Liu, D. Kamburov, S. Hasdemir +4
In two-dimensional electron systems confined to GaAs quantum wells, as a function of either tilting the sample in magnetic field or increasing density, we observe multiple transiti…
What Determines the Fermi Wave Vector of Composite Fermions?
D. Kamburov, Yang Liu, M. A. Mueed +4
Composite fermions (CFs), exotic particles formed by pairing an even number of flux quanta to each electron, provide a fascinating description of phenomena exhibited by interacting…
Fractional Quantum Hall Effect at in Hole Systems Confined to GaAs Quantum Wells
Yang Liu, A. L. Graninger, S. Hasdemir +5
We observe fractional quantum Hall effect (FQHE) at the even-denominator Landau level filling factor in two-dimensional hole systems confined to GaAs quantum wells of width…
Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells
A. T. Hatke, Yang Liu, B. A. Magill +6
In high magnetic fields (), two dimensional electron systems (2DESs) can form a number of phases in which interelectron repulsion plays the central role, since the kinetic energ…
Composite Fermions with Tunable Fermi Contour Anisotropy
D. Kamburov, Yang Liu, M. Shayegan +3
The composite fermion formalism elegantly describes some of the most fascinating behaviours of interacting two-dimensional carriers at low temperatures and in strong perpendicular…
Observation of reentrant quantum Hall states in the lowest Landau level
Yang Liu, C. G. Pappas, M. Shayegan +3
Measurements in very low disorder two-dimensional electrons confined to relatively wide GaAs quantum well samples with tunable density reveal reentrant integer quantum Hall s…
Evolution of the 7/2 fractional quantum Hall state in two-subband systems
Yang Liu, J. Shabani, D. Kamburov +4
We report the evolution of the fractional quantum Hall state (FQHS) at even-denominator filling factor in wide GaAs quantum wells in which electrons occupy two electric sub…
Anomalous robustness of the 5/2 fractional quantum Hall state near a sharp phase boundary
Yang Liu, D. Kamburov, M. Shayegan +3
We report magneto-transport measurements in wide GaAs quantum wells with tunable density to probe the stability of the fractional quantum Hall effect at filling factor 5/2 in…
Fractional Quantum Hall Effect at High Fillings in a Two-subband Electron System
J. Shabani, Y. Liu, M. Shayegan
Magneto-transport measurements in a clean two-dimensional electron system confined to a wide GaAs quantum well reveal that, when the electrons occupy two electric subbands, the seq…