Journal of Experimental and Theoretical Physics Letters

, Volume 79, Issue 4, pp 166–170

Mesoscopic fluctuations of thermopower in a periodic antidot lattice

Authors

  • M. V. Budantsev
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
  • R. A. Lavrov
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
  • A. G. Pogosov
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
    • Tomsk State University
  • A. E. Plotnikov
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
  • A. K. Bakarov
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
  • A. I. Toropov
    • Institute of Semiconductor Physics, Siberian DivisionRussian Academy of Sciences
  • D. K. Maude
    • Grenoble High Magnetic Fields LaboratoryMPI-FKF and CNRS, B.P.166
  • J. C. Portal
    • Grenoble High Magnetic Fields LaboratoryMPI-FKF and CNRS, B.P.166
Condensed Matter

DOI: 10.1134/1.1738716

Cite this article as:
Budantsev, M.V., Lavrov, R.A., Pogosov, A.G. et al. Jetp Lett. (2004) 79: 166. doi:10.1134/1.1738716
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Abstract

The mesoscopic fluctuations of thermopower (MFT) were experimentally observed in an AlGaAs/GaAs heterojunction with a low-resistance (∼0.02h/e2) 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.

PACS numbers

73.23.Ad73.50.Lw
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© MAIK "Nauka/Interperiodica" 2004