Shubnikov- de Haas effect and thermoelectric properties layer and wires

Abstract

Thermoelectric devices have been attracting attention because of their ability to convert to electricity. The most widely used commercial thermoelectric material is bulk Bi2Te3 and its alloys with Sb, Se, and so on, which have ZT=S2T/k1, where S, , k and T are the Seebeck coefficient, electrical resistivity, thermal conductivity and absolute temperature, respectively. It is difficult to scale bulk Bi2Te3 to large-scale energy conversion, but fabricating synthetic nanostructures for his purpose is even more difficult and expensive. The advent of the topological insulator and the emerging micro- and nanotechnology open a new way to design high- performance thermoelectric device. Here we present the investigations the thermoelectric properties and Shubnikov de Haas oscillations in longitudinal and transverse magnetic field of the Bi2Te3 wires and layers on temperature range 2.1-300 K. Bi2Te 3 microwires in glass coating were prepared by the Ulitovsky-Teilor method.