Article Dans Une Revue Physica B: Condensed Matter Année : 2006

Structural instabilities in Nb, Ti and K substituted BaVS3

Guerman Popov
  • Fonction : Auteur
Maxim Lobanov
  • Fonction : Auteur
Martha Greenblatt
  • Fonction : Auteur
Pierre Fertey
  • Fonction : Auteur

Résumé

The one-dimensional (1D) strongly correlated BaVS3 undergoes a series of unexplained phase transitions. Among them it undergoes a metal-insulator (MI) transition associated with a 2 kF = c* / 2 charge density wave (CDW) instability. We show that this CDW ground state is very sensitive to chemical substitutions and/or sulfur deficiency. Substitutions of V with ≈ 2 % of Nb, Ti or Ba with ≈ 2 % K in probably sulfur deficient samples leads to a completely different ground state. This ground state is characterized by a short range structural modulation with the incommensurate wave vector qS = ( frac(1, 3) frac(1, 3) 0.21 )H, which could be due to a CDW taking place in a differently filled dz2 band.

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Dates et versions

hal-04897046 , version 1 (20-01-2025)

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Citer

Sébastien Fagot, Pascale Foury-Leylekian, Jean-Paul Pouget, Guerman Popov, Maxim Lobanov, et al.. Structural instabilities in Nb, Ti and K substituted BaVS3. Physica B: Condensed Matter, 2006, 378-380 (SPEC. ISS.), pp.1068-1069. ⟨10.1016/j.physb.2006.01.487⟩. ⟨hal-04897046⟩
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