Electrical Observation of the Effective Mass in a Single-Crystal WTe2 Layer
- Authors
- Jeon, Jeehoon; Park, Tae-Eon; Jang, Chaun; Kim, Taeyueb; Hong, Jinki; Koo, Hyun Cheol
- Issue Date
- 1월-2019
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Effective mass; WTe2; Shubnikov-de Haas oscillation; Magnetoresistance; Transition-metal dichalcogenides
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.74, no.2, pp.154 - 158
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 74
- Number
- 2
- Start Page
- 154
- End Page
- 158
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/68379
- DOI
- 10.3938/jkps.74.154
- ISSN
- 0374-4884
- 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* = 0.327m(0) which is almost constant in this range. The theoretical expectation values of m*/m(0) 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.
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Collections - College of Science and Technology > Semiconductor Physics in Division of Display and Semiconductor Physics > 1. Journal Articles
- Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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