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Journal Article

Mesoscopic fluctuations of thermopower in a periodic antidot lattice

MPS-Authors
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Maude,  D. K.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Portal,  J. C.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Budantsev, M. V., Lavrov, R. A., Pogosov, A. G., Plotnikov, A. E., Bakarov, A. K., Toropov, A. I., et al. (2004). Mesoscopic fluctuations of thermopower in a periodic antidot lattice. JETP Letters, 79(4), 166-170.


Cite as: https://hdl.handle.net/21.11116/0000-000E-FB82-4
Abstract
The mesoscopic fluctuations of thermopower (MFT) were experimentally
observed in an AlGaAs/GaAs heterojunction with a low-resistance
(similar to0.02h/e(2)) periodic antidot lattice in the situation where
the mesoscopic fluctuations of conductance (MFC) were absent to within
the experimental accuracy. The MFT spectrum contained a periodic
component associated with the Aharonov-Bohm h/e oscillations in the
area occupied by one antidot, whereas the h/2e oscillations were not
observed. It is shown that a sizable contribution to the MFT comes from
the interference of electron trajectories localized inside billiards
formed by four neighboring antidots. Contrary to MFC, the MFT
autocorrelation function in single billiards deviates from the
Lorentzian form. (C) 2004 MAIK "Nauka / Interperiodica".