Abstract
In order to investigate the effective mass of a single-crystalline WTe2 layer, we measured the temperature dependence of the Shubnikov-de Haas oscillation. In this method, the magnetoresistance with a perpendicular magnetic field is monitored by changing the temperature from 1.9 K to 6 K. The extracted effective mass of WTe2 for magnetic fields ranging from 6.8 T to 8.7 T is m* = 0.327m0 which is almost constant in this range. The theoretical expectation values of m*/m0 for the valence and the conduction bands are 0.58 and 0.26, respectively; the experimental value of the effective mass is between these two values. Thus, our results clearly show that single-crystalline WTe2 has both electron- and hole-like pockets that simultaneously contribute to electrical transport in the channel.
Original language | English |
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Pages (from-to) | 154-158 |
Number of pages | 5 |
Journal | Journal of the Korean Physical Society |
Volume | 74 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2019 Jan 1 |
Keywords
- Effective mass
- Magnetoresistance
- Shubnikov-de Haas oscillation
- Transition-metal dichalcogenides
- WTe
ASJC Scopus subject areas
- Physics and Astronomy(all)