Observation of commensurability oscillations of thermopower in an antidot lattice
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- Pogosov, A.G., Budantsev, M.V., Lavrov, R.A. et al. Jetp Lett. (2005) 81: 462. doi:10.1134/1.1984030
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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.