Structural instabilities in Nb, Ti and K substituted BaVS3

Sébastien Fagot, Pascale Foury-Leylekian, Jean Paul Pouget, Guerman Popov, Maxim Lobanov, Martha Greenblatt, Pierre Fertey

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6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1068-1069
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
StatePublished - May 1 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Charge/orbital ordering
  • One-dimensional system

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