TY - GEN
T1 - Nanostructuring and its influence on the thermoelectric properties of the AgSbTe2-SnTe quaternary system
AU - Androulakis, J.
AU - Pcionek, R.
AU - Quarez, E.
AU - Palchik, O.
AU - Kong, H.
AU - Uher, C.
AU - Dangelo, J. J.
AU - Hogan, T.
AU - Tang, X.
AU - Tritt, T.
AU - Kanatzidis, M. G.
PY - 2006/5/8
Y1 - 2006/5/8
N2 - The structural and thermoelectric properties of the AgSbTe2-SnTe quaternary system were studied. Powder averaged x-ray diffraction of Ag 0.85SnSb1.15Tea indicates a cubic NaCl-type structure in contrast with the single crystal refinements, which point towards tetragonal symmetry. Furthermore, high-resolution electron microscopy imaging revealed the system to be a nano-composite formed by thermodynamically driven compositional fluctuations rather than a solid solution as it was viewed in the past. The lattice thermal conductivity attains very low values, which is in accord with recent theories on thermal transport in heterogeneous systems. The charge transport properties of the system exhibit a rich physical behavior highlighted in the coexistence of an almost metallic carrier concentration (∼5 ×1021 cm-3) with a large thermoelectric power response of ∼160 μVYK at 650 K. This is attributed to a heavy hole effective mass that is almost six times that of the electron rest mass.
AB - The structural and thermoelectric properties of the AgSbTe2-SnTe quaternary system were studied. Powder averaged x-ray diffraction of Ag 0.85SnSb1.15Tea indicates a cubic NaCl-type structure in contrast with the single crystal refinements, which point towards tetragonal symmetry. Furthermore, high-resolution electron microscopy imaging revealed the system to be a nano-composite formed by thermodynamically driven compositional fluctuations rather than a solid solution as it was viewed in the past. The lattice thermal conductivity attains very low values, which is in accord with recent theories on thermal transport in heterogeneous systems. The charge transport properties of the system exhibit a rich physical behavior highlighted in the coexistence of an almost metallic carrier concentration (∼5 ×1021 cm-3) with a large thermoelectric power response of ∼160 μVYK at 650 K. This is attributed to a heavy hole effective mass that is almost six times that of the electron rest mass.
UR - http://www.scopus.com/inward/record.url?scp=33646195456&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646195456&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33646195456
SN - 1558998403
SN - 9781558998407
T3 - Materials Research Society Symposium Proceedings
SP - 187
EP - 194
BT - Materials Research Society Symposium Proceedings
T2 - 2005 Materials Research Society Fall Meeting
Y2 - 28 November 2005 through 1 December 2005
ER -