Observation of commensurability oscillations of thermopower in an antidot lattice |
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| Authors: | A. G. Pogosov M. V. Budantsev R. A. Lavrov A. E. Plotnikov A. K. Bakarov A. I. Toropov |
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| Affiliation: | (1) Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia |
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| Abstract: | Commensurability oscillations of thermopower in a square antidot lattice are observed. The oscillations are attributed to the geometrical resonances of the classical electron motion in a magnetic field and are much more pronounced than the corresponding magnetoresistance oscillations. The off-diagonal component of the thermopower tensor (the Nernst-Ettingshausen effect) changes sign at resonances. Additional measurements of magnetoresistance verify the correctness of the method used for thermopower measurements and provide information on the temperature distribution in the sample. |
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