Orthorhombic-to-monoclinic phase transition of Ta2NiSe5 induced by the Bose-Einstein condensation of excitons

T. Kaneko, T. Toriyama, T. Konishi, and Y. Ohta
Phys. Rev. B 87, 035121 – Published 16 January 2013; Erratum Phys. Rev. B 87, 199902 (2013)
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Abstract

Using the band structure calculation and mean-field analysis of the derived three-chain Hubbard model with phonon degrees of freedom, we discuss the origin of the orthorhombic-to-monoclinic phase transition of the layered chalcogenide Ta2NiSe5. We show that the Bose-Einstein condensation of excitonic electron-hole pairs cooperatively induces the instability of the phonon mode at momentum q0 in the quasi-one-dimensional Ta-NiSe-Ta chain, resulting in the structural phase transition of the system. The calculated single-particle spectra reproduce the deformation of the band structure observed in the angle-resolved photoemission spectroscopy experiment.

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  • Received 8 October 2012

DOI:https://doi.org/10.1103/PhysRevB.87.035121

©2013 American Physical Society

Erratum

Authors & Affiliations

T. Kaneko1, T. Toriyama1, T. Konishi2, and Y. Ohta1

  • 1Department of Physics, Chiba University, Chiba 263-8522, Japan
  • 2Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan

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Issue

Vol. 87, Iss. 3 — 15 January 2013

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