• Editors' Suggestion

On the origin of the anomalous peak in the resistivity of TiSe2

Matthew D. Watson, Adam M. Beales, and Philip D. C. King
Phys. Rev. B 99, 195142 – Published 23 May 2019

Abstract

Resistivity measurements of TiSe2 typically show only a weak change in gradient at the charge density wave transition at TCDW200K, but more prominently feature a broad peak at a lower Tpeak165K, which has remained poorly understood despite decades of research on the material. Here we present quantitative simulations of the resistivity using a simplified parametrization of the normal state band structure, based on recent photoemission data. Our simulations reproduce the overall profile of the resistivity of TiSe2, including its prominent peak, without implementing the CDW at all. We find that the peak in resistivity corresponds to a crossover between a low-temperature regime with electronlike carriers only, to a regime around room temperature where thermally activated and highly mobile holelike carriers dominate the conductivity. Even when implementing substantial modifications to model the CDW below the transition temperature, we find that these thermal population effects still dominate the transport properties of TiSe2.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 2 March 2019
  • Revised 12 April 2019

DOI:https://doi.org/10.1103/PhysRevB.99.195142

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Matthew D. Watson*, Adam M. Beales, and Philip D. C. King

  • SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom

  • *mdw5@st-andrews.ac.uk
  • philip.king@st-andrews.ac.uk

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 19 — 15 May 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×