Abstract
We have studied the magnetotransport properties of two-dimensional electrons in thin GaAs-${\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ multilayers with fields up to 210 kG from 4.2 to 2.4 K. We observed that ${\ensuremath{\rho}}_{\mathrm{xx}}$ decreases with decreasing $T$ in the high-field limit $\ensuremath{\nu}=2\ensuremath{\pi}n{l}_{0}^{2}\ensuremath{\lesssim}1$, but ${\ensuremath{\rho}}_{\mathrm{xy}}$ shows no such changes. We show that this result cannot be explained by models based on independent electrons and suggest as possible explanations the formation of a highly correlated state, such as a charge-density wave or Wigner solid previously suggested for the Si inversion layer, and the enhancement of $g$ factor at $\ensuremath{\nu}\ensuremath{\lesssim}1$.
Keywords
PhysicsElectronCondensed matter physicsQuantum mechanics
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Publication Info
- Year
- 1980
- Type
- article
- Volume
- 21
- Issue
- 4
- Pages
- 1589-1595
- Citations
- 27
- Access
- Closed
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Cite This
D. C. Tsui,
H. L. Störmer,
A. C. Gossard
et al.
(1980).
Two-dimensional electrical transport in GaAs-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">As</mml:mi></mml:math>multilayers at high magnetic fields.
Physical review. B, Condensed matter
, 21
(4)
, 1589-1595.
https://doi.org/10.1103/physrevb.21.1589
Identifiers
- DOI
- 10.1103/physrevb.21.1589