Collapse of spin excitations in quantum hall states of coupled electron double layers

Vittorio Pellegrini; Aron Pinczuk; Brian S. Dennis; Annette S. Plaut; Loren N. Pfeiffer; Ken W. West

doi:10.1103/PhysRevLett.78.310

Collapse of spin excitations in quantum hall states of coupled electron double layers

Vittorio Pellegrini, Aron Pinczuk, Brian S. Dennis, Annette S. Plaut, Loren N. Pfeiffer, Ken W. West

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

130 Scopus citations

Abstract

Remarkable softenings of long wavelength intersubband spin excitations of dilute electron double layers are observed at even integer quantum Hall states. These excitations in coupled GaAs double quantum wells were probed by resonant inelastic light scattering. Their softening is attributed to enhanced exchange vertex corrections (excitonic binding) in the quantum Hall states. The collapse of the spin-density mode with δS_z = 0 to an energy close to the Zeeman splitting suggests the existence of unstable spin-flip intersubband excitations with δS_z = 1.

Original language	English (US)
Pages (from-to)	310-313
Number of pages	4
Journal	Physical review letters
Volume	78
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.78.310
State	Published - Jan 13 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.78.310

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title = "Collapse of spin excitations in quantum hall states of coupled electron double layers",

abstract = "Remarkable softenings of long wavelength intersubband spin excitations of dilute electron double layers are observed at even integer quantum Hall states. These excitations in coupled GaAs double quantum wells were probed by resonant inelastic light scattering. Their softening is attributed to enhanced exchange vertex corrections (excitonic binding) in the quantum Hall states. The collapse of the spin-density mode with δSz = 0 to an energy close to the Zeeman splitting suggests the existence of unstable spin-flip intersubband excitations with δSz = 1.",

author = "Vittorio Pellegrini and Aron Pinczuk and Dennis, {Brian S.} and Plaut, {Annette S.} and Pfeiffer, {Loren N.} and West, {Ken W.}",

year = "1997",

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doi = "10.1103/PhysRevLett.78.310",

language = "English (US)",

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AU - Pellegrini, Vittorio

AU - Pinczuk, Aron

AU - Dennis, Brian S.

AU - Plaut, Annette S.

AU - Pfeiffer, Loren N.

AU - West, Ken W.

PY - 1997/1/13

Y1 - 1997/1/13

N2 - Remarkable softenings of long wavelength intersubband spin excitations of dilute electron double layers are observed at even integer quantum Hall states. These excitations in coupled GaAs double quantum wells were probed by resonant inelastic light scattering. Their softening is attributed to enhanced exchange vertex corrections (excitonic binding) in the quantum Hall states. The collapse of the spin-density mode with δSz = 0 to an energy close to the Zeeman splitting suggests the existence of unstable spin-flip intersubband excitations with δSz = 1.

AB - Remarkable softenings of long wavelength intersubband spin excitations of dilute electron double layers are observed at even integer quantum Hall states. These excitations in coupled GaAs double quantum wells were probed by resonant inelastic light scattering. Their softening is attributed to enhanced exchange vertex corrections (excitonic binding) in the quantum Hall states. The collapse of the spin-density mode with δSz = 0 to an energy close to the Zeeman splitting suggests the existence of unstable spin-flip intersubband excitations with δSz = 1.

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DO - 10.1103/PhysRevLett.78.310

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EP - 313

JO - Physical review letters

JF - Physical review letters

IS - 2

ER -

Collapse of spin excitations in quantum hall states of coupled electron double layers

Abstract

All Science Journal Classification (ASJC) codes

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