4.6 Article

Interplay between band crossing and charge density wave instabilities

Journal

PHYSICAL REVIEW B
Volume 100, Issue 8, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.081109

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Funding

  1. CNRS [17-52-150007]
  2. Russian State Fund for the Basic Research [17-52-150007]
  3. Foundation for Advancement of Theoretical Physics and Mathematics BASIS
  4. RFBR [19-02-01000]
  5. [0033-2019-0001]

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Our measurements of the Hall coefficient in rare-earth tritelluride compounds reveal a strong hysteresis between cooling and warming in the low-temperature range where a second unidirectional charge density wave (CDW) occurs. We show that this effect results from the interplay between two instabilities: band crossing of the Te p(x) and p(y) orbitals at the Fermi level and CDW, which have a close energy gain and compete. Calculation of the electron susceptibility at the CDW wave vector with and without band anticrossing reconstruction of the electron spectrum yields a satisfactory estimation of the temperature range of the hysteresis in Hall effect measurements.

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