Quantum hall to insulator transition in the bilayer quantum hall ferromagnet

Ganpathy Murthy; Subir Sachdev

doi:10.1103/PhysRevLett.101.226801

Quantum hall to insulator transition in the bilayer quantum hall ferromagnet

Ganpathy Murthy, Subir Sachdev

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Abstract

We describe a phase transition of the bilayer quantum Hall ferromagnet at ν=1. In the presence of static disorder (modeled by a periodic potential), bosonic S=1/2 spinons undergo a superfluid-insulator transition while preserving ferromagnetism. The Mott insulating phase has an emergent U(1) photon, and the transition is between Higgs and Coulomb phases of this photon. Consequences for charge and counterflow conductivity and for interlayer tunneling conductance are discussed.

Original language	English
Article number	226801
Journal	Physical Review Letters
Volume	101
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.101.226801
State	Published - Nov 24 2008

Funding

Funders	Funder number
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	0757145, 0703992

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.101.226801

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title = "Quantum hall to insulator transition in the bilayer quantum hall ferromagnet",

abstract = "We describe a phase transition of the bilayer quantum Hall ferromagnet at ν=1. In the presence of static disorder (modeled by a periodic potential), bosonic S=1/2 spinons undergo a superfluid-insulator transition while preserving ferromagnetism. The Mott insulating phase has an emergent U(1) photon, and the transition is between Higgs and Coulomb phases of this photon. Consequences for charge and counterflow conductivity and for interlayer tunneling conductance are discussed.",

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AU - Sachdev, Subir

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AB - We describe a phase transition of the bilayer quantum Hall ferromagnet at ν=1. In the presence of static disorder (modeled by a periodic potential), bosonic S=1/2 spinons undergo a superfluid-insulator transition while preserving ferromagnetism. The Mott insulating phase has an emergent U(1) photon, and the transition is between Higgs and Coulomb phases of this photon. Consequences for charge and counterflow conductivity and for interlayer tunneling conductance are discussed.

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Quantum hall to insulator transition in the bilayer quantum hall ferromagnet

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