Crystal growth and transport properties of Weyl semimetal TaAs

Raman Sankar, G. Peramaiyan, I. Panneer Muthuselvam, Suyang Xu, M. Zahid Hasan, F. C. Chou

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We report the single crystal growth and transport properties of a Weyl semimetal TaAs. Unsaturated large magnetoresistance of about 22 100% at 2 K and 9 T is observed. From the Hall measurement, carrier concentrations n = 4.608 × 1024 m-3 and p = 3.099 × 1024 m-3, and mobilities mg p = 2.502 m2 V-1 s-1 and μ n = 16.785 m2 V-1 s-1 at 2 K are extracted. The de Haas-van Alphen oscillations at 2 K and 9 T suggest the presence of a Fermi surface, and the quantum electronic parameters such as effective cyclotron mass and Dingle temperature were obtained using Lifshitz-Kosevich fitting. Temperature dependent resistivity measurements at different static magnetic fields suggest the formation of an insulating gap in the Weyl semimetal TaAs. An angle-resolved photoemission spectroscopy study reveals Fermi arc surface states with different shaped features such as a long elliptical contour around each point, a bowtie-shaped contour around each point, and a crescent-shaped feature near the midpoint of each line.

Original languageEnglish (US)
Article number015803
JournalJournal of Physics Condensed Matter
Volume30
Issue number1
DOIs
StatePublished - Jan 10 2018

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • Weyl semimetal
  • field induced semiconducting behavior
  • quantum oscillation

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