Magnetoconductivity of two-dimensional electrons on liquid helium

Experiments in the fluid phase

M. J. Lea, P. Fozooni, A. Kristensen, P. J. Richardson, K. Djerfi, M. I. Dykman, Christopher Fang-Yen, A. Blackburn

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The magnetoconductivity σ(B) of two-dimensional electrons on liquid helium was measured from 0.25 to 1.3 K in the electron fluid phase in magnetic fields up to 8 T. In low magnetic fields B, σ(0)/σ(B) = 1 + (μB)2 as in the Drude model, where μ is the zero-field mobility due to scattering by 4He vapor atoms and ripplons even for μB ≫ 1. The values of mobility are in good agreement with previous measurements and with calculations for a correlated electron fluid. At higher fields, σ(0)/σ(B) deviates from the Drude model and becomes density dependent due to many-electron effects. Only at the highest fields, or the lowest densities, does σ(B) approach the theoretical single-particle magnetoconductivity. For both vapor-atom and npplon scattering the results are in good agreement with a microscopic many-electron theory in which the diffusion of the cyclotron orbits is controlled by the internal fluctuational electric fields. The density and temperature dependence of these internal fields derived from the experiments are in excellent agreement with Monte Carlo simulations.

Original languageEnglish
Pages (from-to)16280-16292
Number of pages13
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number24
Publication statusPublished - 1997 Jun 15
Externally publishedYes

Fingerprint

Helium
liquid helium
Fluids
Electrons
fluids
Liquids
electrons
Experiments
many electron effects
vapors
Vapors
Scattering
Magnetic fields
Atoms
scattering
magnetic fields
cyclotrons
atoms
Cyclotrons
orbits

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Lea, M. J., Fozooni, P., Kristensen, A., Richardson, P. J., Djerfi, K., Dykman, M. I., ... Blackburn, A. (1997). Magnetoconductivity of two-dimensional electrons on liquid helium: Experiments in the fluid phase. Physical Review B - Condensed Matter and Materials Physics, 55(24), 16280-16292.

Magnetoconductivity of two-dimensional electrons on liquid helium : Experiments in the fluid phase. / Lea, M. J.; Fozooni, P.; Kristensen, A.; Richardson, P. J.; Djerfi, K.; Dykman, M. I.; Fang-Yen, Christopher; Blackburn, A.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 55, No. 24, 15.06.1997, p. 16280-16292.

Research output: Contribution to journalArticle

Lea, MJ, Fozooni, P, Kristensen, A, Richardson, PJ, Djerfi, K, Dykman, MI, Fang-Yen, C & Blackburn, A 1997, 'Magnetoconductivity of two-dimensional electrons on liquid helium: Experiments in the fluid phase', Physical Review B - Condensed Matter and Materials Physics, vol. 55, no. 24, pp. 16280-16292.
Lea MJ, Fozooni P, Kristensen A, Richardson PJ, Djerfi K, Dykman MI et al. Magnetoconductivity of two-dimensional electrons on liquid helium: Experiments in the fluid phase. Physical Review B - Condensed Matter and Materials Physics. 1997 Jun 15;55(24):16280-16292.
Lea, M. J. ; Fozooni, P. ; Kristensen, A. ; Richardson, P. J. ; Djerfi, K. ; Dykman, M. I. ; Fang-Yen, Christopher ; Blackburn, A. / Magnetoconductivity of two-dimensional electrons on liquid helium : Experiments in the fluid phase. In: Physical Review B - Condensed Matter and Materials Physics. 1997 ; Vol. 55, No. 24. pp. 16280-16292.
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