Glassy behavior in quantum Hall bilayers

H. A. Fertig; Joseph P. Straley

doi:10.1016/j.physe.2003.11.213

Glassy behavior in quantum Hall bilayers

Research output: Contribution to journal › Conference article › peer-review

Abstract

Interlayer tunneling in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. It is shown that sufficiently strong disorder induces strings of overturned spins and unpaired vortices to proliferate through the system. This string glass state supports low energy excitations which lead to anomalously large dissipation when a small tunneling is present, as observed in experiment. Strong interlayer tunneling currents can depin the strings and lead to nearly normal dissipation above a critical current. This depinning phenomenon also explains the behavior of experiments in parallel magnetic fields.

Original language	English
Pages (from-to)	48-51
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	22
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physe.2003.11.213
State	Published - Apr 2004
Event	15th International Conference on ELectronic Propreties - Nara, Japan Duration: Jul 14 2003 → Jul 18 2003

Bibliographical note

Funding Information:
This work was supported by NSF Grant No. DMR-0108451. Computer time was provided by University of Kentucky through NCSA Grant No. DMR-020024.

Keywords

Bilayer
Josephson tunneling
Langevin dynamics
Quantum Hall effect
XY model

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.physe.2003.11.213

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title = "Glassy behavior in quantum Hall bilayers",

abstract = "Interlayer tunneling in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. It is shown that sufficiently strong disorder induces strings of overturned spins and unpaired vortices to proliferate through the system. This string glass state supports low energy excitations which lead to anomalously large dissipation when a small tunneling is present, as observed in experiment. Strong interlayer tunneling currents can depin the strings and lead to nearly normal dissipation above a critical current. This depinning phenomenon also explains the behavior of experiments in parallel magnetic fields.",

keywords = "Bilayer, Josephson tunneling, Langevin dynamics, Quantum Hall effect, XY model",

author = "Fertig, {H. A.} and Straley, {Joseph P.}",

note = "Funding Information: This work was supported by NSF Grant No. DMR-0108451. Computer time was provided by University of Kentucky through NCSA Grant No. DMR-020024. ; 15th International Conference on ELectronic Propreties ; Conference date: 14-07-2003 Through 18-07-2003",

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doi = "10.1016/j.physe.2003.11.213",

language = "English",

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TY - JOUR

T1 - Glassy behavior in quantum Hall bilayers

AU - Fertig, H. A.

AU - Straley, Joseph P.

N1 - Funding Information: This work was supported by NSF Grant No. DMR-0108451. Computer time was provided by University of Kentucky through NCSA Grant No. DMR-020024.

PY - 2004/4

Y1 - 2004/4

N2 - Interlayer tunneling in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. It is shown that sufficiently strong disorder induces strings of overturned spins and unpaired vortices to proliferate through the system. This string glass state supports low energy excitations which lead to anomalously large dissipation when a small tunneling is present, as observed in experiment. Strong interlayer tunneling currents can depin the strings and lead to nearly normal dissipation above a critical current. This depinning phenomenon also explains the behavior of experiments in parallel magnetic fields.

AB - Interlayer tunneling in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. It is shown that sufficiently strong disorder induces strings of overturned spins and unpaired vortices to proliferate through the system. This string glass state supports low energy excitations which lead to anomalously large dissipation when a small tunneling is present, as observed in experiment. Strong interlayer tunneling currents can depin the strings and lead to nearly normal dissipation above a critical current. This depinning phenomenon also explains the behavior of experiments in parallel magnetic fields.

KW - Bilayer

KW - Josephson tunneling

KW - Langevin dynamics

KW - Quantum Hall effect

KW - XY model

UR - http://www.scopus.com/inward/record.url?scp=1842684885&partnerID=8YFLogxK

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U2 - 10.1016/j.physe.2003.11.213

DO - 10.1016/j.physe.2003.11.213

M3 - Conference article

AN - SCOPUS:1842684885

SN - 1386-9477

VL - 22

SP - 48

EP - 51

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-3

T2 - 15th International Conference on ELectronic Propreties

Y2 - 14 July 2003 through 18 July 2003

ER -

Glassy behavior in quantum Hall bilayers

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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