FTIR Reflectivity spectra of Thermoelectric K2Sb8Se13 crystals

Author

Hatzikraniotis, E. ; Hassapis, Th. ; Kyratsi, Th. ; Paraskevopoulos, K.M. ; Kanatzidis, M.G.

Author_Institution

Dept. of Phys., Aristotle Univ. of Thessaloniki

fYear

2006

fDate

6-10 Aug. 2006

Firstpage

573

Lastpage

578

Abstract

Investigations of ternary and quaternary compounds, Bi and Sb chalcogenides, have shown that several multinary compounds containing alkali metals present promising thermoelectric properties. In this work, the FTIR reflectivity spectra of K₂Sb₈Se₁₃ crystals are reported and analyzed for the first time. Optical investigations are conducted with or without polarization, in two directions, parallel and perpendicular to the needles. The observed distinct optical anisotropy investigated by means of polarization dependent reflectivity measurements is discussed with respect to the strong structural anisotropy

Keywords

Fourier transform spectra; anisotropic media; antimony compounds; crystal structure; infrared spectra; potassium compounds; reflectivity; selenium compounds; FTIR reflectivity spectra; Fourier transform-infrared spectra; K₂Sb₈Se₁₃; optical anisotropy; polarization dependent reflectivity measurements; structural anisotropy; thermoelectric crystals; Anisotropic magnetoresistance; Crystals; Geometrical optics; Needles; Optical polarization; Phonons; Reflectivity; Tellurium; Thermal conductivity; Thermoelectricity;

fLanguage

English

Publisher

ieee

Conference_Titel

Thermoelectrics, 2006. ICT '06. 25th International Conference on

Conference_Location

Vienna

ISSN

1094-2734

Print_ISBN

1-4244-0811-3

Electronic_ISBN

1094-2734

Type

conf

DOI

10.1109/ICT.2006.331379

Filename

4133358