Signatures of composite-fermion metals in electron bilayers at νT=1

Biswajit Karmakar; Stefano Luin; Vittorio Pellegrini; Aron Pinczuk; Brian S. Dennis; Loren N. Pfeiffer; Ken W. West

doi:10.1016/j.physe.2007.09.204

Signatures of composite-fermion metals in electron bilayers at ν_T=1

Biswajit Karmakar, Stefano Luin, Vittorio Pellegrini, Aron Pinczuk, Brian S. Dennis, Loren N. Pfeiffer, Ken W. West

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

Abstract

Composite-fermion metals occur in the quantum Hall bilayers at total Landau level filling fraction ν_T=1 as the tunneling gap Δ_SAS collapses by application of in-plane magnetic fields. Experimental evidence is obtained from the observation of a spin continuum below the Zeeman energy by resonant inelastic light scattering. These low-lying spin modes are assigned to quasi-particle excitations, where spin and composite-fermion Landau level index change simultaneously.

Original language	English (US)
Pages (from-to)	1312-1314
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2007.09.204
State	Published - Mar 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

Keywords

Composite-fermion metal
Inelastic light scattering
Phase transition
Quantum Hall bilayers

Access to Document

10.1016/j.physe.2007.09.204

Cite this

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title = "Signatures of composite-fermion metals in electron bilayers at νT=1",

abstract = "Composite-fermion metals occur in the quantum Hall bilayers at total Landau level filling fraction νT=1 as the tunneling gap ΔSAS collapses by application of in-plane magnetic fields. Experimental evidence is obtained from the observation of a spin continuum below the Zeeman energy by resonant inelastic light scattering. These low-lying spin modes are assigned to quasi-particle excitations, where spin and composite-fermion Landau level index change simultaneously.",

keywords = "Composite-fermion metal, Inelastic light scattering, Phase transition, Quantum Hall bilayers",

author = "Biswajit Karmakar and Stefano Luin and Vittorio Pellegrini and Aron Pinczuk and Dennis, {Brian S.} and Pfeiffer, {Loren N.} and West, {Ken W.}",

year = "2008",

month = mar,

doi = "10.1016/j.physe.2007.09.204",

language = "English (US)",

volume = "40",

pages = "1312--1314",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "5",

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TY - JOUR

T1 - Signatures of composite-fermion metals in electron bilayers at νT=1

AU - Karmakar, Biswajit

AU - Luin, Stefano

AU - Pellegrini, Vittorio

AU - Pinczuk, Aron

AU - Dennis, Brian S.

AU - Pfeiffer, Loren N.

AU - West, Ken W.

PY - 2008/3

Y1 - 2008/3

N2 - Composite-fermion metals occur in the quantum Hall bilayers at total Landau level filling fraction νT=1 as the tunneling gap ΔSAS collapses by application of in-plane magnetic fields. Experimental evidence is obtained from the observation of a spin continuum below the Zeeman energy by resonant inelastic light scattering. These low-lying spin modes are assigned to quasi-particle excitations, where spin and composite-fermion Landau level index change simultaneously.

AB - Composite-fermion metals occur in the quantum Hall bilayers at total Landau level filling fraction νT=1 as the tunneling gap ΔSAS collapses by application of in-plane magnetic fields. Experimental evidence is obtained from the observation of a spin continuum below the Zeeman energy by resonant inelastic light scattering. These low-lying spin modes are assigned to quasi-particle excitations, where spin and composite-fermion Landau level index change simultaneously.

KW - Composite-fermion metal

KW - Inelastic light scattering

KW - Phase transition

KW - Quantum Hall bilayers

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