A relatively pure and perfect Weil semimetal Mo 0.5 W 0.5 Te 2 single crystal was synthesized and its electrical resistivity, galvanomagnetic properties at temperatures from 4.2 to 80 K in magnetic fields up to 10 T and also optical properties at room temperature were studied. It is shown that the temperature dependence of the resistivity has a metallic type. At T = 4.2 K and in a field of 10 T, the magnetoresistivity reaches 29%, monotonously decreasing with temperature. Analysis of the field and temperature dependences of the magnetoresistivity suggests that the Fermi surface of the Mo 0.5 W 0.5 Te 2 can contain both open and closed sheets. Studies of the Hall effect and estimates made on this basis showed that the majority carriers are electrons with a concentration of ~ 10 20 cm –3 and mobility of ~ 151 cm 2 /V·s at T = 4.2 K. Concentration of current carriers increases with temperature, and mobility decreases. Optical studies showed that the Mo 0.5 W 0.5 Te 2 single crystal does not exhibit features characteristic of metals. Interband absorption of light dominates over the entire studied range of the spectrum. The appearance of a weak contribution from free carriers is noted at energies of less than 0.6 eV.
|Translated title of the contribution||Electronic transport and optical properties of Mo 0.5 W 0.5 Te 2 single crystal|
|Number of pages||5|
|Journal||Fizika Nizkikh Temperatur|
|Publication status||Published - 2019 Feb|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)