Light scattering determination of roton densities of states in two-dimensional landau level excitations

A. Pinczuk; J. P. Valladares; D. Heiman; L. N. Pfeiffer; K. W. West

doi:10.1016/0039-6028(90)90912-R

Light scattering determination of roton densities of states in two-dimensional landau level excitations

A. Pinczuk, J. P. Valladares, D. Heiman, L. N. Pfeiffer, K. W. West

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

7 Scopus citations

Abstract

We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions.

Original language	English (US)
Pages (from-to)	384-387
Number of pages	4
Journal	Surface Science
Volume	229
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(90)90912-R
State	Published - Apr 2 1990
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(90)90912-R

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title = "Light scattering determination of roton densities of states in two-dimensional landau level excitations",

abstract = "We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions.",

author = "A. Pinczuk and Valladares, {J. P.} and D. Heiman and Pfeiffer, {L. N.} and West, {K. W.}",

year = "1990",

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T1 - Light scattering determination of roton densities of states in two-dimensional landau level excitations

AU - Pinczuk, A.

AU - Valladares, J. P.

AU - Heiman, D.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 1990/4/2

Y1 - 1990/4/2

N2 - We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions.

AB - We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions.

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U2 - 10.1016/0039-6028(90)90912-R

DO - 10.1016/0039-6028(90)90912-R

M3 - Article

AN - SCOPUS:33744562883

SN - 0039-6028

VL - 229

SP - 384

EP - 387

JO - Surface Science

JF - Surface Science

IS - 1-3

ER -

Light scattering determination of roton densities of states in two-dimensional landau level excitations

Abstract

All Science Journal Classification (ASJC) codes

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