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 language | English |
|---|---|
| Pages (from-to) | 16280-16292 |
| Number of pages | 13 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 55 |
| Issue number | 24 |
| Publication status | Published - 1997 Jun 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
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 journal › Article
}
TY - JOUR
T1 - Magnetoconductivity of two-dimensional electrons on liquid helium
T2 - Experiments in the fluid phase
AU - Lea, M. J.
AU - Fozooni, P.
AU - Kristensen, A.
AU - Richardson, P. J.
AU - Djerfi, K.
AU - Dykman, M. I.
AU - Fang-Yen, Christopher
AU - Blackburn, A.
PY - 1997/6/15
Y1 - 1997/6/15
N2 - 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.
AB - 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.
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M3 - Article
VL - 55
SP - 16280
EP - 16292
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 24
ER -