Theoretical Prediction of a Time-Reversal Broken Chiral Superconducting Phase Driven by Electronic Correlations in a Single TiSe2 Layer

R. Ganesh, G. Baskaran, Jeroen van den Brink, and Dmitry V. Efremov
Phys. Rev. Lett. 113, 177001 – Published 20 October 2014
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Abstract

Bulk TiSe2 is an intrinsically layered transition metal dichalcogenide hosting both superconducting and charge-density-wave ordering. Motivated by the recent progress in preparing two-dimensional transition metal dichalcogenides, we study these frustrated orderings in a single trilayer of TiSe2. Using a renormalization group approach, we find that electronic correlations can give rise to charge-density-wave order and two kinds of superconductivity. One possible superconducting state corresponds to unconventional s+ pairing. The other is particularly exciting as it is chiral, breaking time-reversal symmetry. Its stability depends on the precise strength and screening of the electron-electron interactions in two-dimensional TiSe2.

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  • Received 19 May 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.177001

© 2014 American Physical Society

Authors & Affiliations

R. Ganesh1, G. Baskaran2,3, Jeroen van den Brink1,4, and Dmitry V. Efremov1

  • 1Institute for Theoretical Solid State Physics, IFW-Dresden, D-01171 Dresden, Germany
  • 2The Institute of Mathematical Sciences, CIT Campus, Chennai 600 113, India
  • 3Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada N2L 2Y5
  • 4Department of Physics, TU Dresden, D-01062 Dresden, Germany

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Issue

Vol. 113, Iss. 17 — 24 October 2014

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