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Article Dans Une Revue Physical Review B Année : 2019

Interplay between band crossing and charge density wave instabilities

Résumé

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 px and py 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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hal-03964971 , version 1 (24-08-2023)

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P. Grigoriev, A. Sinchenko, P. Vorobyev, A. Hadj-Azzem, P. Lejay, et al.. Interplay between band crossing and charge density wave instabilities. Physical Review B, 2019, 100 (8), pp.081109. ⟨10.1103/PhysRevB.100.081109⟩. ⟨hal-03964971⟩

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