Pinning modes of high-magnetic-field Wigner solids with controlled alloy disorder

B. H. Moon; L. W. Engel; D. C. Tsui; L. N. Pfeiffer; K. W. West

doi:10.1103/PhysRevB.89.075310

Pinning modes of high-magnetic-field Wigner solids with controlled alloy disorder

B. H. Moon, L. W. Engel, D. C. Tsui, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

For a series of samples with two-dimensional electron systems in dilute AlxGa1-xAs, with varying x from 0% to 0.85%, we survey the pinning mode resonances of Wigner solids at the low Landau filling termination of the fractional quantum Hall effect series. For all x studied, the pinning modes are present with frequencies fpk that are consistent with collective weak pinning. For x≥0.22% we find fpk vs B exhibits a rapid increase that is not present for x=0. We find the observed fpk is much smaller than values calculated with a simple Wigner solid model which neglects the effects of the disorder on the charge distribution of a carrier.

Original language	English (US)
Article number	075310
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.89.075310
State	Published - Feb 24 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.89.075310

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abstract = "For a series of samples with two-dimensional electron systems in dilute AlxGa1-xAs, with varying x from 0% to 0.85%, we survey the pinning mode resonances of Wigner solids at the low Landau filling termination of the fractional quantum Hall effect series. For all x studied, the pinning modes are present with frequencies fpk that are consistent with collective weak pinning. For x≥0.22% we find fpk vs B exhibits a rapid increase that is not present for x=0. We find the observed fpk is much smaller than values calculated with a simple Wigner solid model which neglects the effects of the disorder on the charge distribution of a carrier.",

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AU - Moon, B. H.

AU - Engel, L. W.

AU - Tsui, D. C.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2014/2/24

Y1 - 2014/2/24

N2 - For a series of samples with two-dimensional electron systems in dilute AlxGa1-xAs, with varying x from 0% to 0.85%, we survey the pinning mode resonances of Wigner solids at the low Landau filling termination of the fractional quantum Hall effect series. For all x studied, the pinning modes are present with frequencies fpk that are consistent with collective weak pinning. For x≥0.22% we find fpk vs B exhibits a rapid increase that is not present for x=0. We find the observed fpk is much smaller than values calculated with a simple Wigner solid model which neglects the effects of the disorder on the charge distribution of a carrier.

AB - For a series of samples with two-dimensional electron systems in dilute AlxGa1-xAs, with varying x from 0% to 0.85%, we survey the pinning mode resonances of Wigner solids at the low Landau filling termination of the fractional quantum Hall effect series. For all x studied, the pinning modes are present with frequencies fpk that are consistent with collective weak pinning. For x≥0.22% we find fpk vs B exhibits a rapid increase that is not present for x=0. We find the observed fpk is much smaller than values calculated with a simple Wigner solid model which neglects the effects of the disorder on the charge distribution of a carrier.

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Pinning modes of high-magnetic-field Wigner solids with controlled alloy disorder

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