Effects of stochastic webs on chaotic electron transport in semiconductor superlattices

Effects of stochastic webs on chaotic electron transport in semiconductor superlattices

We investigate chaotic electron transport in the lowest miniband of a semiconductor superlattice with a tilted magnetic field. This experimentally accessible non-Kolmogorov-Arnol'd-Moser system involves only stationary electric and magnetic fields, but is dynamically equivalent to a time-depend...

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Bibliographic Details
Published in:Physical review letters Vol. 87; no. 4; p. 046803
Main Authors: Fromhold, T M, Krokhin, A A, Tench, C R, Bujkiewicz, S, Wilkinson, P B, Sheard, F W, Eaves, L
Format: Journal Article
Language:English
Published: United States The American Physical Society 23-07-2001
Subjects:
CYCLOTRONS
ELECTRIC CONDUCTIVITY
ELECTRONS
HARMONIC OSCILLATORS
MAGNETIC FIELDS
PARTICLE ACCELERATORS
PHASE SPACE
SUPERLATTICES
TRANSPORT
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Summary:We investigate chaotic electron transport in the lowest miniband of a semiconductor superlattice with a tilted magnetic field. This experimentally accessible non-Kolmogorov-Arnol'd-Moser system involves only stationary electric and magnetic fields, but is dynamically equivalent to a time-dependent kicked harmonic oscillator. The onset of chaos strongly delocalizes the electron orbits, thus raising the electrical conductivity. When the cyclotron and Bloch frequencies are commensurate, the phase space is threaded by a stochastic web, which produces a further resonant increase in the conductivity.
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content type line 23
US
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.87.046803