FIZIKA A 1 (1992) 3, 207-217

THE THERMOELECTRIC POWER IN QUANTUM DOTS OF SEMIMETALS UNDER LARGE MAGNETIC FIELD

KAMAKHYA PRASAD GHATAK
Department of Electronics and Telecommunication Engineering, Faculty of Engineering and Technology, University of Jadavpur, Calcutta 700032, India

Received 14 February 1992

We study the thermoelectric power of the carriers in quantum dots of semimetals under large magnetic field, taking Bi as an example. The numerical results are presented for McClure and Choi, hybrid, Cohen, Lax and ellipsoidal parabolic energy band models of Bi. It is observed that the thermopower increases with decreasing electron concentration, increasing magnetic field and increasing film thickness, respectively. The oscillations of the TPM in Bi, in accordance with McClure and Choi model, show up much more significantly as compared to other models. In addition, the corresponding well-known expression for the thermoelectric power in the presence of a classically strong magnetic field in bulk specimens of parabolic semiconductors has been obtained as a special case of our generalized expressions.

UDC 538.915

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