Fermi-surface reconstruction to a pressure-induced metal-insulator transition

J. Wosnitza; J. Hagel; O. Stockert; C. Pfleiderer; J. A. Schlueter; J. Mohtasham; G. L. Gard

doi:10.1051/jp4:2004114058

Fermi-surface reconstruction to a pressure-induced metal-insulator transition

J. Wosnitza, J. Hagel, O. Stockert, C. Pfleiderer, J. A. Schlueter, J. Mohtasham, G. L. Gard

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

We report on a detailed investigation of the pressure-dependent structural and electronic properties close to the pressure-induced metal-insulator transition of the quasi-two-dimensional organic superconductor β″-(BEDT-TTF)₂SF₅CH₂CF ₂SO₃, where BEDT-TTF stand for bisethylenedithio- tetrathiafulvalene (or ET for short). Although the pressure-dependent hysteresis of the metal-insulator transition suggests a structural origin, no major crystallographic modifications could be detected by neutron-scattering experiments. Shubnikov-de Haas (SdH) experiments, on the other hand, show that a reconstructed band structure precedes the phase transition to the insulating state. A new SdH frequency with a rather small effective mass appears.

Original language	English
Pages (from-to)	277-281
Number of pages	5
Journal	Journal De Physique. IV : JP
Volume	114
DOIs	https://doi.org/10.1051/jp4:2004114058
State	Published - 2004
Externally published	Yes
Event	ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets - Port-Bourgenay, France Duration: 21 Sep 2003 → 26 Sep 2003

Keywords

Band structure
Metal-insulator transition
Organic superconductors

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10.1051/jp4:2004114058

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title = "Fermi-surface reconstruction to a pressure-induced metal-insulator transition",

abstract = "We report on a detailed investigation of the pressure-dependent structural and electronic properties close to the pressure-induced metal-insulator transition of the quasi-two-dimensional organic superconductor β″-(BEDT-TTF)2SF5CH2CF 2SO3, where BEDT-TTF stand for bisethylenedithio- tetrathiafulvalene (or ET for short). Although the pressure-dependent hysteresis of the metal-insulator transition suggests a structural origin, no major crystallographic modifications could be detected by neutron-scattering experiments. Shubnikov-de Haas (SdH) experiments, on the other hand, show that a reconstructed band structure precedes the phase transition to the insulating state. A new SdH frequency with a rather small effective mass appears.",

keywords = "Band structure, Metal-insulator transition, Organic superconductors",

author = "J. Wosnitza and J. Hagel and O. Stockert and C. Pfleiderer and Schlueter, {J. A.} and J. Mohtasham and Gard, {G. L.}",

year = "2004",

doi = "10.1051/jp4:2004114058",

language = "English",

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pages = "277--281",

journal = "Journal De Physique. IV : JP",

issn = "1155-4339",

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note = "ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets ; Conference date: 21-09-2003 Through 26-09-2003",

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TY - JOUR

T1 - Fermi-surface reconstruction to a pressure-induced metal-insulator transition

AU - Wosnitza, J.

AU - Hagel, J.

AU - Stockert, O.

AU - Pfleiderer, C.

AU - Schlueter, J. A.

AU - Mohtasham, J.

AU - Gard, G. L.

PY - 2004

Y1 - 2004

N2 - We report on a detailed investigation of the pressure-dependent structural and electronic properties close to the pressure-induced metal-insulator transition of the quasi-two-dimensional organic superconductor β″-(BEDT-TTF)2SF5CH2CF 2SO3, where BEDT-TTF stand for bisethylenedithio- tetrathiafulvalene (or ET for short). Although the pressure-dependent hysteresis of the metal-insulator transition suggests a structural origin, no major crystallographic modifications could be detected by neutron-scattering experiments. Shubnikov-de Haas (SdH) experiments, on the other hand, show that a reconstructed band structure precedes the phase transition to the insulating state. A new SdH frequency with a rather small effective mass appears.

AB - We report on a detailed investigation of the pressure-dependent structural and electronic properties close to the pressure-induced metal-insulator transition of the quasi-two-dimensional organic superconductor β″-(BEDT-TTF)2SF5CH2CF 2SO3, where BEDT-TTF stand for bisethylenedithio- tetrathiafulvalene (or ET for short). Although the pressure-dependent hysteresis of the metal-insulator transition suggests a structural origin, no major crystallographic modifications could be detected by neutron-scattering experiments. Shubnikov-de Haas (SdH) experiments, on the other hand, show that a reconstructed band structure precedes the phase transition to the insulating state. A new SdH frequency with a rather small effective mass appears.

KW - Band structure

KW - Metal-insulator transition

KW - Organic superconductors

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U2 - 10.1051/jp4:2004114058

DO - 10.1051/jp4:2004114058

M3 - Conference article

AN - SCOPUS:25444460189

SN - 1155-4339

VL - 114

SP - 277

EP - 281

JO - Journal De Physique. IV : JP

JF - Journal De Physique. IV : JP

T2 - ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets

Y2 - 21 September 2003 through 26 September 2003

ER -

Fermi-surface reconstruction to a pressure-induced metal-insulator transition

Abstract

Keywords

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