Magnetic field orientation dependent ground states in (TMTSF)2PF6

E. I. Chashechkina; P. M. Chaikin

doi:10.1016/S0379-6779(98)00352-X

Magnetic field orientation dependent ground states in (TMTSF)₂PF₆

E. I. Chashechkina, P. M. Chaikin

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

Abstract

We report anisotropic and angular dependent magneto-resistance measurements in the 'normal' state of TMTSF₂PF₆ under pressure at low temperature. The most striking feature of this study occurs below 5K where we observe metallic behavior (dR/dT>0) when the field is aligned along intermolecular tunneling directions (Lebed magic angles) and non-metallic behavior (dR/dT>0) for other orientations. Previous results showed this behavior along the most conducting a direction, but here we show that the b and c (interplane) directions also exhibit this metallic to non-metallic transition with angle. At higher temperatures ( approx. 15-20K) there is a resistance minimum in the conducting (a-b) plane which is absent in the interplane (c) direction. Since we expect phase transitions, or other changes in the electronic state, to be observable in all directions, this observation implies that the nature of the ground state is reflected in the 5K magic angle effects and is determined by interplane decoupling rather than in-plane dimensionality crossovers.

Original language	English (US)
Pages (from-to)	2176-2179
Number of pages	4
Journal	Synthetic Metals
Volume	103
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(98)00352-X
State	Published - Jun 24 1999
Event	Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier Duration: Jul 12 1998 → Jul 18 1998

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(98)00352-X

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title = "Magnetic field orientation dependent ground states in (TMTSF)2PF6",

abstract = "We report anisotropic and angular dependent magneto-resistance measurements in the 'normal' state of TMTSF2PF6 under pressure at low temperature. The most striking feature of this study occurs below 5K where we observe metallic behavior (dR/dT>0) when the field is aligned along intermolecular tunneling directions (Lebed magic angles) and non-metallic behavior (dR/dT>0) for other orientations. Previous results showed this behavior along the most conducting a direction, but here we show that the b and c (interplane) directions also exhibit this metallic to non-metallic transition with angle. At higher temperatures ( approx. 15-20K) there is a resistance minimum in the conducting (a-b) plane which is absent in the interplane (c) direction. Since we expect phase transitions, or other changes in the electronic state, to be observable in all directions, this observation implies that the nature of the ground state is reflected in the 5K magic angle effects and is determined by interplane decoupling rather than in-plane dimensionality crossovers.",

author = "Chashechkina, {E. I.} and Chaikin, {P. M.}",

year = "1999",

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doi = "10.1016/S0379-6779(98)00352-X",

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note = "Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) ; Conference date: 12-07-1998 Through 18-07-1998",

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TY - JOUR

T1 - Magnetic field orientation dependent ground states in (TMTSF)2PF6

AU - Chashechkina, E. I.

AU - Chaikin, P. M.

PY - 1999/6/24

Y1 - 1999/6/24

N2 - We report anisotropic and angular dependent magneto-resistance measurements in the 'normal' state of TMTSF2PF6 under pressure at low temperature. The most striking feature of this study occurs below 5K where we observe metallic behavior (dR/dT>0) when the field is aligned along intermolecular tunneling directions (Lebed magic angles) and non-metallic behavior (dR/dT>0) for other orientations. Previous results showed this behavior along the most conducting a direction, but here we show that the b and c (interplane) directions also exhibit this metallic to non-metallic transition with angle. At higher temperatures ( approx. 15-20K) there is a resistance minimum in the conducting (a-b) plane which is absent in the interplane (c) direction. Since we expect phase transitions, or other changes in the electronic state, to be observable in all directions, this observation implies that the nature of the ground state is reflected in the 5K magic angle effects and is determined by interplane decoupling rather than in-plane dimensionality crossovers.

AB - We report anisotropic and angular dependent magneto-resistance measurements in the 'normal' state of TMTSF2PF6 under pressure at low temperature. The most striking feature of this study occurs below 5K where we observe metallic behavior (dR/dT>0) when the field is aligned along intermolecular tunneling directions (Lebed magic angles) and non-metallic behavior (dR/dT>0) for other orientations. Previous results showed this behavior along the most conducting a direction, but here we show that the b and c (interplane) directions also exhibit this metallic to non-metallic transition with angle. At higher temperatures ( approx. 15-20K) there is a resistance minimum in the conducting (a-b) plane which is absent in the interplane (c) direction. Since we expect phase transitions, or other changes in the electronic state, to be observable in all directions, this observation implies that the nature of the ground state is reflected in the 5K magic angle effects and is determined by interplane decoupling rather than in-plane dimensionality crossovers.

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U2 - 10.1016/S0379-6779(98)00352-X

DO - 10.1016/S0379-6779(98)00352-X

M3 - Conference article

AN - SCOPUS:0033138148

SN - 0379-6779

VL - 103

SP - 2176

EP - 2179

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

T2 - Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98)

Y2 - 12 July 1998 through 18 July 1998

ER -

Magnetic field orientation dependent ground states in (TMTSF)₂PF₆

Abstract

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