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Title: ν = 1 / 2 fractional quantum Hall effect in tilted magnetic fields

Abstract

Magnetotransport measurements on two-dimensional electrons confined to wide GaAs quantum wells reveal a remarkable evolution of the ground state at filling factor nu = 1/2 as we tilt the sample in the magnetic field. Starting with a compressible state at zero tilt angle, a strong nu = 1/2 fractional quantum Hall state appears at intermediate angles. At higher angles an insulating phase surrounds this state and eventually engulfs it at the highest angles. This evolution occurs because the parallel component of the field renders the charge distribution increasingly bilayer-like. The evolution is qualitatively similar to the one seen, in the absence of parallel field, as a function of increasing the electron density in the quantum well, but there are some notable differences.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1352842
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 91; Journal Issue: 4
Country of Publication:
United States
Language:
English

Citation Formats

Hasdemir, S., Liu, Yang, Deng, H., Shayegan, M., Pfeiffer, L. N., West, K. W., Baldwin, K. W., and Winkler, R. ν=1/2 fractional quantum Hall effect in tilted magnetic fields. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.045113.
Hasdemir, S., Liu, Yang, Deng, H., Shayegan, M., Pfeiffer, L. N., West, K. W., Baldwin, K. W., & Winkler, R. ν=1/2 fractional quantum Hall effect in tilted magnetic fields. United States. doi:10.1103/PhysRevB.91.045113.
Hasdemir, S., Liu, Yang, Deng, H., Shayegan, M., Pfeiffer, L. N., West, K. W., Baldwin, K. W., and Winkler, R. Thu . "ν=1/2 fractional quantum Hall effect in tilted magnetic fields". United States. doi:10.1103/PhysRevB.91.045113.
@article{osti_1352842,
title = {ν=1/2 fractional quantum Hall effect in tilted magnetic fields},
author = {Hasdemir, S. and Liu, Yang and Deng, H. and Shayegan, M. and Pfeiffer, L. N. and West, K. W. and Baldwin, K. W. and Winkler, R.},
abstractNote = {Magnetotransport measurements on two-dimensional electrons confined to wide GaAs quantum wells reveal a remarkable evolution of the ground state at filling factor nu = 1/2 as we tilt the sample in the magnetic field. Starting with a compressible state at zero tilt angle, a strong nu = 1/2 fractional quantum Hall state appears at intermediate angles. At higher angles an insulating phase surrounds this state and eventually engulfs it at the highest angles. This evolution occurs because the parallel component of the field renders the charge distribution increasingly bilayer-like. The evolution is qualitatively similar to the one seen, in the absence of parallel field, as a function of increasing the electron density in the quantum well, but there are some notable differences.},
doi = {10.1103/PhysRevB.91.045113},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 4,
volume = 91,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}