Charge density wave dynamics in nonvolatile current-induced phase transition in 1TTaS2

Masaro Yoshida, Takuro Sato, Fumitaka Kagawa, and Yoshihiro Iwasa
Phys. Rev. B 100, 155125 – Published 15 October 2019
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Abstract

1TTaS2 shows various electronic phases including complex charge density waves (CDWs), Mott insulator, superconductor, and spin liquid. In addition to such thermodynamically stable states, thermally inaccessible metastable metallic states can be induced by means of current. We investigated the nonlinear, nonvolatile current-induced phase transition to the metastable state by performing noise spectroscopy measurements. We found a broadband noise emerging above the threshold current for the transition. This indicates the sliding motion of the current-induced metastable CDWs, which are stabilized after CDW sheets slide to form another stacking structure with metallic characters. Nonvolatility is likely attributed to the commensurability of CDWs.

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  • Received 13 May 2019
  • Revised 9 September 2019

DOI:https://doi.org/10.1103/PhysRevB.100.155125

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Masaro Yoshida1,*, Takuro Sato1, Fumitaka Kagawa1,2, and Yoshihiro Iwasa1,2,3

  • 1RIKEN Center for Emergent Matter Science (CEMS), Wako 351–0198, Japan
  • 2Department of Applied Physics, the University of Tokyo, Tokyo 113–8656, Japan
  • 3Quantum-Phase Electronics Center (QPEC), the University of Tokyo, Tokyo 113–8656, Japan

  • *masaro.yoshida@riken.jp

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Issue

Vol. 100, Iss. 15 — 15 October 2019

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