Spectroscopic study of the charge density wave order in 2H-TaS2

J. Zhao, K. Wijayaratne, C. D. Malliakas, Mercouri G Kanatzidis, D. Y. Chung, G. Gu, U. Chatterjee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We conduct Angle Resolved Photoemission Spectroscopy (ARPES) investigation on 2H-TaS2, a prototypical incommensurate Charge Density Wave (CDW) material. A comparative study of the low-energy electronic structures of 2H-TaS2 and two other related compounds, 2H-TaSe2 and 2H-NbSe2, identifies several generic features of their CDW orders. Firstly, Fermi surface (FS) nesting alone doesn't seem to give rise to the CDW instability in these compounds. Secondly, partial gapping of the underlying FS surface in the CDW state is common to each of these materials. Finally, the CDW energy gap, unlike the energy gap in a superconductor, is not symmetric with respect to the chemical potential.

Original languageEnglish
Title of host publicationSpintronics X
PublisherSPIE
Volume10357
ISBN (Electronic)9781510611719
DOIs
Publication statusPublished - Jan 1 2017
EventSpintronics X Symposium - San Diego, United States
Duration: Aug 6 2017Aug 10 2017

Other

OtherSpintronics X Symposium
CountryUnited States
CitySan Diego
Period8/6/178/10/17

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Keywords

  • Angle Resolved Photoemission Spectroscopy
  • Bogoliubov dispersion
  • Charge density wave
  • Energy gap
  • Fermi surface
  • Particle-hole symmetry.
  • Superconductor
  • Transition metal dichalcogenide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Zhao, J., Wijayaratne, K., Malliakas, C. D., Kanatzidis, M. G., Chung, D. Y., Gu, G., & Chatterjee, U. (2017). Spectroscopic study of the charge density wave order in 2H-TaS2. In Spintronics X (Vol. 10357). [103570Q] SPIE. https://doi.org/10.1117/12.2273391