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Title: Morphing of two-dimensional hole systems at ν = 3 / 2 in parallel magnetic fields: Compressible, stripe, and fractional quantum Hall phases

Journal Article · · Physical Review B

A transport study of two-dimensional (2D) holes confined to wide GaAs quantum wells provides a glimpse of a subtle competition between different many-body phases at a Landau level filling ν = 3/2 in tilted magnetic fields. At large tilt angles (θ), an anisotropic, stripe (or nematic) phase replaces the isotropic compressible Fermi sea at ν = 3/2 if the quantum well has a symmetric charge distribution. Furthermore, when the charge distribution is made asymmetric, instead of the stripe phase, an even-denominator fractional quantum state appears at ν = 3/2 in a range of large θ, and reverts back to a compressible state at even higher θ. We attribute this remarkable evolution to the significant mixing of the excited and ground-state Landau levels of 2D hole systems in tilted fields.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation
Grant/Contract Number:
FG02-00ER45841; DMR-130569; DMR-1420541; DMR-1157490; GBMF4420; FG02-00-ER45841
OSTI ID:
1535778
Alternate ID(s):
OSTI ID: 1330484
Journal Information:
Physical Review B, Vol. 94, Issue 15; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Cited By (1)

A cascade of phase transitions in an orbitally mixed half-filled Landau level journal September 2018