Collective excitations in the dilute 2D electron system

M. A. Eriksson; A. Pinczuk; B. S. Dennis; S. H. Simon; L. N. Pfeiffer; K. W. West

doi:10.1103/PhysRevLett.82.2163

Collective excitations in the dilute 2D electron system

M. A. Eriksson, A. Pinczuk, B. S. Dennis, S. H. Simon, L. N. Pfeiffer, K. W. West

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

68 Scopus citations

Abstract

We report inelastic light scattering measurements of dispersive spin and charge density excitations in dilute 2D electron systems reaching densities less than 10¹⁰cm^-2. In the quantum Hall state at ν=2, roton critical points in the spin inter-Landau level mode show a pronounced softening as r_s is increased. Instead of a soft mode instability predicted by Hartree-Fock calculations for r_s˜3.3, we find evidence of multiple rotons in the dispersion of the softening spin excitations.

Original language	English (US)
Pages (from-to)	2163-2166
Number of pages	4
Journal	Physical review letters
Volume	82
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.82.2163
State	Published - 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.82.2163

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title = "Collective excitations in the dilute 2D electron system",

abstract = "We report inelastic light scattering measurements of dispersive spin and charge density excitations in dilute 2D electron systems reaching densities less than 1010cm-2. In the quantum Hall state at ν=2, roton critical points in the spin inter-Landau level mode show a pronounced softening as rs is increased. Instead of a soft mode instability predicted by Hartree-Fock calculations for rs˜3.3, we find evidence of multiple rotons in the dispersion of the softening spin excitations.",

author = "Eriksson, {M. A.} and A. Pinczuk and Dennis, {B. S.} and Simon, {S. H.} and Pfeiffer, {L. N.} and West, {K. W.}",

year = "1999",

doi = "10.1103/PhysRevLett.82.2163",

language = "English (US)",

volume = "82",

pages = "2163--2166",

journal = "Physical review letters",

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T1 - Collective excitations in the dilute 2D electron system

AU - Eriksson, M. A.

AU - Pinczuk, A.

AU - Dennis, B. S.

AU - Simon, S. H.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 1999

Y1 - 1999

N2 - We report inelastic light scattering measurements of dispersive spin and charge density excitations in dilute 2D electron systems reaching densities less than 1010cm-2. In the quantum Hall state at ν=2, roton critical points in the spin inter-Landau level mode show a pronounced softening as rs is increased. Instead of a soft mode instability predicted by Hartree-Fock calculations for rs˜3.3, we find evidence of multiple rotons in the dispersion of the softening spin excitations.

AB - We report inelastic light scattering measurements of dispersive spin and charge density excitations in dilute 2D electron systems reaching densities less than 1010cm-2. In the quantum Hall state at ν=2, roton critical points in the spin inter-Landau level mode show a pronounced softening as rs is increased. Instead of a soft mode instability predicted by Hartree-Fock calculations for rs˜3.3, we find evidence of multiple rotons in the dispersion of the softening spin excitations.

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U2 - 10.1103/PhysRevLett.82.2163

DO - 10.1103/PhysRevLett.82.2163

M3 - Article

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SP - 2163

EP - 2166

JO - Physical review letters

JF - Physical review letters

IS - 10

ER -

Collective excitations in the dilute 2D electron system

Abstract

All Science Journal Classification (ASJC) codes

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