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TT: Fachverband Tiefe Temperaturen
TT 22: Low-dimensional Systems - Materials
TT 22.4: Vortrag
Donnerstag, 29. März 2007, 10:15–10:30, H18
Quadratic temperature dependence of the resistivity up to 50 K of transition metal dichalcogenides with distorted CdI2-structure — •Thorsten Zandt, Helmut Dwelk, Christoph Janowitz, and Recardo Manzke — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin
In this contribution we present a detailed study of the temperature dependence of the electrical resistivity and magnetoresistance of β/Td-MoTe2, WTe2, NbTe2 and TaTe2 single crystals between 1.7 K and 350 K. In particular, the electrical resistivity, R(T)-R(0), shows at low temperatures a gradient proportional to T2 up to 50 K what is atypical for ’normal’ metallic behavior. In contrast, the magnetoresistance shows a normal characteristics for a metal. These results will be discussed within the framework of several microscopic mechanisms, e.g. like electron-electron scattering, which include electron-electron, hole-hole, and electron-hole processes [1].
[1] T. Zandt, H. Dwelk, C. Janowitz und R. Manzke: Quadratic temperature dependence of the resistivity up to 50 K of metallic MoTe2, proceedings of the 15th International Conference on Solid Compounds of Transition Elements Krakau 2006, will be published 2007 in the Journal of Alloys and Compounds