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

doi:https://doi.org/10.1016/j.physb.2006.01.487

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

SAS - Chem & Chemical Biology

Rutgers, The State University

Research output: Contribution to journal › Article › peer-review

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 k_F = 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 q_S = ( frac(1, 3) frac(1, 3) 0.21 )_H, which could be due to a CDW taking place in a differently filled d_z2 band.

Original language	English (US)
Pages (from-to)	1068-1069
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.487
State	Published - May 1 2006

ASJC Scopus subject areas

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

Keywords

Charge/orbital ordering
One-dimensional system

Access to Document

https://doi.org/10.1016/j.physb.2006.01.487

Cite this

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title = "Structural instabilities in Nb, Ti and K substituted BaVS3",

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.",

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T1 - Structural instabilities in Nb, Ti and K substituted BaVS3

AU - Fagot, Sébastien

AU - Foury-Leylekian, Pascale

AU - Pouget, Jean Paul

AU - Popov, Guerman

AU - Lobanov, Maxim

AU - Greenblatt, Martha

AU - Fertey, Pierre

PY - 2006/5/1

Y1 - 2006/5/1

N2 - 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.

AB - 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.

KW - Charge/orbital ordering

KW - One-dimensional system

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