77 Se NMR probe of magnetic excitations of the magic angle effect in (TMTSF)2PF6

Weida Wu; P. M. Chaikin; W. Kang; J. Shinagawa; W. Yu; S. E. Brown

doi:10.1103/PhysRevLett.94.097004

⁷⁷ Se NMR probe of magnetic excitations of the magic angle effect in (TMTSF)₂PF₆

Weida Wu, P. M. Chaikin, W. Kang, J. Shinagawa, W. Yu, S. E. Brown

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Abstract

We report ⁷⁷Se spin-lattice relaxation rates for (TMTSF) ₂PF₆, carried out in the regime where a set of spectacular transport anomalies known as the "magic angle effects" are observed. In situ resistance measurements (R_zz) were used to verify the experimental conditions and give precise sample alignment information. We found that the ⁷⁷Se T₁^-1 exhibits no significant changes as the magnetic-field orientation is rotated through the magic angles, and conclude that there is no evidence for either a single-particle gap or a spin gap. The clearly observed field-induced spin-density wave transition temperature is also, unexpectedly, not enhanced at the magic angles.

Original language	English (US)
Article number	097004
Journal	Physical Review Letters
Volume	94
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.94.097004
State	Published - Mar 11 2005

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General Physics and Astronomy

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abstract = "We report 77Se spin-lattice relaxation rates for (TMTSF) 2PF6, carried out in the regime where a set of spectacular transport anomalies known as the {"}magic angle effects{"} are observed. In situ resistance measurements (Rzz) were used to verify the experimental conditions and give precise sample alignment information. We found that the 77Se T1-1 exhibits no significant changes as the magnetic-field orientation is rotated through the magic angles, and conclude that there is no evidence for either a single-particle gap or a spin gap. The clearly observed field-induced spin-density wave transition temperature is also, unexpectedly, not enhanced at the magic angles.",

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AU - Wu, Weida

AU - Chaikin, P. M.

AU - Kang, W.

AU - Shinagawa, J.

AU - Yu, W.

AU - Brown, S. E.

PY - 2005/3/11

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N2 - We report 77Se spin-lattice relaxation rates for (TMTSF) 2PF6, carried out in the regime where a set of spectacular transport anomalies known as the "magic angle effects" are observed. In situ resistance measurements (Rzz) were used to verify the experimental conditions and give precise sample alignment information. We found that the 77Se T1-1 exhibits no significant changes as the magnetic-field orientation is rotated through the magic angles, and conclude that there is no evidence for either a single-particle gap or a spin gap. The clearly observed field-induced spin-density wave transition temperature is also, unexpectedly, not enhanced at the magic angles.

AB - We report 77Se spin-lattice relaxation rates for (TMTSF) 2PF6, carried out in the regime where a set of spectacular transport anomalies known as the "magic angle effects" are observed. In situ resistance measurements (Rzz) were used to verify the experimental conditions and give precise sample alignment information. We found that the 77Se T1-1 exhibits no significant changes as the magnetic-field orientation is rotated through the magic angles, and conclude that there is no evidence for either a single-particle gap or a spin gap. The clearly observed field-induced spin-density wave transition temperature is also, unexpectedly, not enhanced at the magic angles.

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⁷⁷ Se NMR probe of magnetic excitations of the magic angle effect in (TMTSF)₂PF₆

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