Details
| Original language | English |
|---|---|
| Pages (from-to) | 1540-1543 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 78 |
| Issue number | 8 |
| Publication status | Published - 24 Feb 1997 |
Abstract
The local density of states of heavily doped GaAs is explored at high magnetic fields, where only a single or few Landau bands are occupied. Our experiment is based on resonant tunneling through impurity states and images the local density of states both below and above the Fermi level. Fan-type mesoscopic fluctuations are observed in the energy–magnetic-field plane, which we attribute to the interplay of Landau quantization and quantum interference of scattered electron waves in the disordered conductor. Our conclusion is supported by the suppression of the fluctuations high above the Fermi level, where dephasing due to inelastic processes is as fast as elastic scattering.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 78, No. 8, 24.02.1997, p. 1540-1543.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Observation of the local structure of landau bands in a disordered conductor
AU - Schmidt, T.
AU - Haug, R. J.
AU - Fal’ko, Vladimir I.
AU - Klitzing, K. V.
AU - Förster, A.
AU - Lüth, H.
PY - 1997/2/24
Y1 - 1997/2/24
N2 - The local density of states of heavily doped GaAs is explored at high magnetic fields, where only a single or few Landau bands are occupied. Our experiment is based on resonant tunneling through impurity states and images the local density of states both below and above the Fermi level. Fan-type mesoscopic fluctuations are observed in the energy–magnetic-field plane, which we attribute to the interplay of Landau quantization and quantum interference of scattered electron waves in the disordered conductor. Our conclusion is supported by the suppression of the fluctuations high above the Fermi level, where dephasing due to inelastic processes is as fast as elastic scattering.
AB - The local density of states of heavily doped GaAs is explored at high magnetic fields, where only a single or few Landau bands are occupied. Our experiment is based on resonant tunneling through impurity states and images the local density of states both below and above the Fermi level. Fan-type mesoscopic fluctuations are observed in the energy–magnetic-field plane, which we attribute to the interplay of Landau quantization and quantum interference of scattered electron waves in the disordered conductor. Our conclusion is supported by the suppression of the fluctuations high above the Fermi level, where dephasing due to inelastic processes is as fast as elastic scattering.
UR - http://www.scopus.com/inward/record.url?scp=0031079323&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.78.1540
DO - 10.1103/PhysRevLett.78.1540
M3 - Article
AN - SCOPUS:0031079323
VL - 78
SP - 1540
EP - 1543
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 8
ER -