TY - JOUR
T1 - Reentrant insulating phases in the integer quantum Hall regime
AU - Knighton, Talbot
AU - Wu, Zhe
AU - Tarquini, Vinicio
AU - Huang, Jian
AU - Pfeiffer, L. N.
AU - West, K. W.
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/10/14
Y1 - 2014/10/14
N2 - Quantum Hall measurements are performed in a dilute high-quality GaAs two-dimensional hole system with carrier densities of (4.4-5.3)×1010cm-2. With the rs value approximately 20, the interaction effect is already strong even in the absence of magnetic field. In the integer quantum Hall regime up to 2 T, a series of reentrant insulating phases (RIPs) are observed between fillings 1, 2, 3, and 4, with peak locations periodic in 1/B. Moreover, the RIP peaks are also characterized by a striking inductance in response to ac excitations, which is likely due to the onset of a Wigner crystal state. The multiple RIP peaks indicate a more complex phase diagram than previously perceived.
AB - Quantum Hall measurements are performed in a dilute high-quality GaAs two-dimensional hole system with carrier densities of (4.4-5.3)×1010cm-2. With the rs value approximately 20, the interaction effect is already strong even in the absence of magnetic field. In the integer quantum Hall regime up to 2 T, a series of reentrant insulating phases (RIPs) are observed between fillings 1, 2, 3, and 4, with peak locations periodic in 1/B. Moreover, the RIP peaks are also characterized by a striking inductance in response to ac excitations, which is likely due to the onset of a Wigner crystal state. The multiple RIP peaks indicate a more complex phase diagram than previously perceived.
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U2 - 10.1103/PhysRevB.90.165117
DO - 10.1103/PhysRevB.90.165117
M3 - Article
AN - SCOPUS:84908031950
SN - 1098-0121
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
M1 - 165117
ER -