Magnetoresistance of 1T–Ta<SUB>1−<I>x</I></SUB>Ti<I><SUB>x</SUB></I>S<SUB>2</SUB> near the Metal-Nonmetal Transition at Ultra Low Temperatures

DOI Web Site Web Site BIBCODE 2 Citations 14 References
  • Kobayashi Norio
    The Research Institute for Iron, Steel and Other Metals, Tohoku University
  • Sasaki Takako
    The Research Institute for Iron, Steel and Other Metals, Tohoku University
  • Muto Yoshio
    The Research Institute for Iron, Steel and Other Metals, Tohoku University

Bibliographic Information

Other Title
  • Magnetoresistance of 1T-Ta1-xTixS2 near the Metal-Nonmetal Transition at Ultra Low Temperatures
  • Magnetoresistance of 1T Ta1 xTixS2 near
  • Magnetoresistance of 1T–Ta<sub>1-<i>x</i></sub>Ti<sub><i>x</i></sub>S<sub>2</sub> near the Metal-Nonmetal Transition at Ultra Low Temperatures

Search this article

Abstract

The temperature and magnetic field dependences of electrical resistivity of four 1T–Ta1−xTixS2 samples (x=0.01, 0.03, 0.07 and 0.09) were measured down to 20 mK and up to 90 kOe. In this system, a metal-nonmetal transition occurs at a concentration between x=0.03 and 0.07. In higher concentration samples (x=0.07 and 0.09), the electrical resistivity shows the temperature dependence due to the variable-range hopping in the Anderson localized states, while in lower ones (x=0.01 and 0.03) becomes metallic below 20 K, showing no temperature dependence below 1 K. The large positive magnetoresistance is observed in the temperature range between 10 and 0.1 K and the negative one is found below 0.1 K for higher concentration samples. The magnetoresistance of lower ones increases monotonically with decreasing temperature. These behaviors of the magnetoresistance are understood by the recent Yosida and Fukuyama model.

Journal

Citations (2)*help

See more

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top