Electrical Observation of the Effective Mass in a Single-Crystal WTe2 Layer

Jeehoon Jeon, Tae Eon Park, Chaun Jang, Taeyueb Kim, Jinki Hong, Hyun Cheol Koo

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)154-158
Number of pages5
JournalJournal of the Korean Physical Society
Volume74
Issue number2
DOIs
Publication statusPublished - 2019 Jan 1

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single crystals
magnetic fields
conduction bands
valence
temperature dependence
oscillations
electrons
temperature

Keywords

  • Effective mass
  • Magnetoresistance
  • Shubnikov-de Haas oscillation
  • Transition-metal dichalcogenides
  • WTe

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electrical Observation of the Effective Mass in a Single-Crystal WTe2 Layer. / Jeon, Jeehoon; Park, Tae Eon; Jang, Chaun; Kim, Taeyueb; Hong, Jinki; Koo, Hyun Cheol.

In: Journal of the Korean Physical Society, Vol. 74, No. 2, 01.01.2019, p. 154-158.

Research output: Contribution to journalArticle

Jeon, Jeehoon ; Park, Tae Eon ; Jang, Chaun ; Kim, Taeyueb ; Hong, Jinki ; Koo, Hyun Cheol. / Electrical Observation of the Effective Mass in a Single-Crystal WTe2 Layer. In: Journal of the Korean Physical Society. 2019 ; Vol. 74, No. 2. pp. 154-158.
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