Metamorphosis of a quantum Hall bilayer state into a composite fermion metal

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

doi:10.1016/j.ssc.2007.07.005

Metamorphosis of a quantum Hall bilayer state into a composite fermion metal

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

5 Scopus citations

Abstract

Composite fermion (CF) metal states emerge in quantum Hall bilayers at total Landau level filling factor ν_T = 1 when the tunneling gap collapses by application of in-plane component of the magnetic field. Evidence of this transformation is found in the continua of spin excitations observed by inelastic light scattering below the spin-wave mode at the Zeeman energy. The low-lying spin modes are interpreted as quasiparticle excitations with simultaneous changes in spin orientation and composite fermion Landau level index. The results highlight significant differences of bilayer CF quasiparticles from those in single layers.

Original language	English (US)
Pages (from-to)	499-503
Number of pages	5
Journal	Solid State Communications
Volume	143
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ssc.2007.07.005
State	Published - Sep 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. Bilayers
D. Composite fermions
D. Phase transitions
E. Light scattering

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10.1016/j.ssc.2007.07.005

Cite this

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title = "Metamorphosis of a quantum Hall bilayer state into a composite fermion metal",

abstract = "Composite fermion (CF) metal states emerge in quantum Hall bilayers at total Landau level filling factor νT = 1 when the tunneling gap collapses by application of in-plane component of the magnetic field. Evidence of this transformation is found in the continua of spin excitations observed by inelastic light scattering below the spin-wave mode at the Zeeman energy. The low-lying spin modes are interpreted as quasiparticle excitations with simultaneous changes in spin orientation and composite fermion Landau level index. The results highlight significant differences of bilayer CF quasiparticles from those in single layers.",

keywords = "A. Bilayers, D. Composite fermions, D. Phase transitions, E. Light scattering",

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 = "2007",

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doi = "10.1016/j.ssc.2007.07.005",

language = "English (US)",

volume = "143",

pages = "499--503",

journal = "Solid State Communications",

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TY - JOUR

T1 - Metamorphosis of a quantum Hall bilayer state into a composite fermion metal

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 - 2007/9

Y1 - 2007/9

N2 - Composite fermion (CF) metal states emerge in quantum Hall bilayers at total Landau level filling factor νT = 1 when the tunneling gap collapses by application of in-plane component of the magnetic field. Evidence of this transformation is found in the continua of spin excitations observed by inelastic light scattering below the spin-wave mode at the Zeeman energy. The low-lying spin modes are interpreted as quasiparticle excitations with simultaneous changes in spin orientation and composite fermion Landau level index. The results highlight significant differences of bilayer CF quasiparticles from those in single layers.

AB - Composite fermion (CF) metal states emerge in quantum Hall bilayers at total Landau level filling factor νT = 1 when the tunneling gap collapses by application of in-plane component of the magnetic field. Evidence of this transformation is found in the continua of spin excitations observed by inelastic light scattering below the spin-wave mode at the Zeeman energy. The low-lying spin modes are interpreted as quasiparticle excitations with simultaneous changes in spin orientation and composite fermion Landau level index. The results highlight significant differences of bilayer CF quasiparticles from those in single layers.

KW - A. Bilayers

KW - D. Composite fermions

KW - D. Phase transitions

KW - E. Light scattering

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U2 - 10.1016/j.ssc.2007.07.005

DO - 10.1016/j.ssc.2007.07.005

M3 - Article

AN - SCOPUS:34548025065

SN - 0038-1098

VL - 143

SP - 499

EP - 503

JO - Solid State Communications

JF - Solid State Communications

IS - 11-12

ER -

Metamorphosis of a quantum Hall bilayer state into a composite fermion metal

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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