Title :
Anisotropic Scattering in the (Bi, Sb)2 (Te, Se, S)3 Solid Solutions
Author :
Lukyanova, L.N. ; Kutasov, V.A. ; Popov, V.V. ; Konstantinov, P.P. ; Fedorov, M.I.
Author_Institution :
Ioffe Phys.-Tech. Inst., Russian Acad. of Sci., St. Petersburg
Abstract :
Analysis of thermoelectric and galvanomagnetic properties is carried out for solid solutions (Bi, Sb)2(Te, Se, S)3 with various substitutions of atoms in sublattices of basic Bi 2Te3 compound. The increase in thermoelectric figure of merit Z is observed in the compositions with a weak anisotropy of charge carriers in mirror plane. In addition, relaxation time tensor component along trigonal direction (tau33), which is perpendicular to a direction of crystal growth, decreases in comparison with components along binary (tau11) and bisector (tau 11) directions
Keywords :
antimony compounds; bismuth compounds; carrier relaxation time; galvanomagnetic effects; selenium compounds; solid solutions; tellurium compounds; thermoelectricity; (BiSb)2(TeSeS)3; anisotropic scattering; charge carriers; crystal growth; galvanomagnetic property; relaxation time tensor component; solid solutions; thermoelectric merit figure; thermoelectric property; Anisotropic magnetoresistance; Bismuth; Charge carriers; Lattices; Scattering; Solids; Tellurium; Temperature; Thermal conductivity; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 2006. ICT '06. 25th International Conference on
Conference_Location :
Vienna
Print_ISBN :
1-4244-0811-3
Electronic_ISBN :
1094-2734
DOI :
10.1109/ICT.2006.331342
