Magic angles (lebed's and others), and the phase diagram of the bechgaard Salts

G. M. Danner; S. McKernan; X. D. Shi; W. Kang; S. T. Hannahs; P. M. Chaikin

doi:10.1016/0379-6779(94)02632-9

Magic angles (lebed's and others), and the phase diagram of the bechgaard Salts

G. M. Danner, S. McKernan, X. D. Shi, W. Kang, S. T. Hannahs, P. M. Chaikin

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

Abstract

We present transport data on the metallic and Field Induced Spin Density Wave phases of the Bechgaard Salts (TMTSF)₂PF₆ and (TMTSF)₂ClO₄. The a and c axis resistivities (ρ_xxand ρ_zz) of these compounds have been measured for magnetic field rotations in the b-c planes (Lebed geometry) and striking resistance dips are observed at magic angles. We examine the differences between the two materials and the status of our understanding of the Lebed resonances. We then investigate the resistivities for magnetic fields rotated in the a-c plane. In this case we find a new set of resonances which for the first time allow direct measurements of the Fermi surface parameters of quasi-one-dimensional metals. Extending ρ_xxand ρ_zz measurements to 30 Tesla we have found that the phase boundary for the FISDW in (TMTSF)₂ClO₄ is most easily investigated by temperature dependent studies of ρ_zz at high field. We find a new phase below a nearly temperature independent and we discuss some of the properties of this phase.

Original language	English (US)
Pages (from-to)	731-734
Number of pages	4
Journal	Synthetic Metals
Volume	70
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(94)02632-9
State	Published - Mar 15 1995

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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title = "Magic angles (lebed's and others), and the phase diagram of the bechgaard Salts",

abstract = "We present transport data on the metallic and Field Induced Spin Density Wave phases of the Bechgaard Salts (TMTSF)2PF6 and (TMTSF)2ClO4. The a and c axis resistivities (ρxxand ρzz) of these compounds have been measured for magnetic field rotations in the b-c planes (Lebed geometry) and striking resistance dips are observed at magic angles. We examine the differences between the two materials and the status of our understanding of the Lebed resonances. We then investigate the resistivities for magnetic fields rotated in the a-c plane. In this case we find a new set of resonances which for the first time allow direct measurements of the Fermi surface parameters of quasi-one-dimensional metals. Extending ρxxand ρzz measurements to 30 Tesla we have found that the phase boundary for the FISDW in (TMTSF)2ClO4 is most easily investigated by temperature dependent studies of ρzz at high field. We find a new phase below a nearly temperature independent and we discuss some of the properties of this phase.",

author = "Danner, {G. M.} and S. McKernan and Shi, {X. D.} and W. Kang and Hannahs, {S. T.} and Chaikin, {P. M.}",

year = "1995",

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doi = "10.1016/0379-6779(94)02632-9",

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T1 - Magic angles (lebed's and others), and the phase diagram of the bechgaard Salts

AU - Danner, G. M.

AU - McKernan, S.

AU - Shi, X. D.

AU - Kang, W.

AU - Hannahs, S. T.

AU - Chaikin, P. M.

PY - 1995/3/15

Y1 - 1995/3/15

N2 - We present transport data on the metallic and Field Induced Spin Density Wave phases of the Bechgaard Salts (TMTSF)2PF6 and (TMTSF)2ClO4. The a and c axis resistivities (ρxxand ρzz) of these compounds have been measured for magnetic field rotations in the b-c planes (Lebed geometry) and striking resistance dips are observed at magic angles. We examine the differences between the two materials and the status of our understanding of the Lebed resonances. We then investigate the resistivities for magnetic fields rotated in the a-c plane. In this case we find a new set of resonances which for the first time allow direct measurements of the Fermi surface parameters of quasi-one-dimensional metals. Extending ρxxand ρzz measurements to 30 Tesla we have found that the phase boundary for the FISDW in (TMTSF)2ClO4 is most easily investigated by temperature dependent studies of ρzz at high field. We find a new phase below a nearly temperature independent and we discuss some of the properties of this phase.

AB - We present transport data on the metallic and Field Induced Spin Density Wave phases of the Bechgaard Salts (TMTSF)2PF6 and (TMTSF)2ClO4. The a and c axis resistivities (ρxxand ρzz) of these compounds have been measured for magnetic field rotations in the b-c planes (Lebed geometry) and striking resistance dips are observed at magic angles. We examine the differences between the two materials and the status of our understanding of the Lebed resonances. We then investigate the resistivities for magnetic fields rotated in the a-c plane. In this case we find a new set of resonances which for the first time allow direct measurements of the Fermi surface parameters of quasi-one-dimensional metals. Extending ρxxand ρzz measurements to 30 Tesla we have found that the phase boundary for the FISDW in (TMTSF)2ClO4 is most easily investigated by temperature dependent studies of ρzz at high field. We find a new phase below a nearly temperature independent and we discuss some of the properties of this phase.

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JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Magic angles (lebed's and others), and the phase diagram of the bechgaard Salts

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