Analysis of 13C-NMR spectra in C60 superconductors : Hyperfine coupling constants, electronic correlation effect, and magnetic penetration depth

Sato, N.; Tou, Hideki; Maniwa, Y.; Kikuchi, K.; Suzuki, S.; Achiba, Y.; Kosaka, M.; Tanigaki, K.

doi:10.1103/PhysRevB.58.12433

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Analysis of 13C-NMR spectra in C60 superconductors : Hyperfine coupling constants, electronic correlation effect, and magnetic penetration depth

https://hiroshima.repo.nii.ac.jp/records/2008625

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1998PRB_58_12433_1.pdf (164.2 KB)

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デフォルトアイテムタイプ_（フル）(1)

公開日

2023-03-18

タイトル

Analysis of 13C-NMR spectra in C60 superconductors : Hyperfine coupling constants, electronic correlation effect, and magnetic penetration depth

言語

作成者

Sato, N.
Tou, Hideki
Maniwa, Y.
Kikuchi, K.
Suzuki, S.
Achiba, Y.
Kosaka, M.
Tanigaki, K.

アクセス権

open access

アクセス権URI

http://purl.org/coar/access_right/c_abf2

権利情報

主題

主題Scheme

NDC

主題

420

内容記述

A 13C-NMR anisotropic hyperfine coupling tensor was determined as 2π(-1.68, -1.68, 3.37)×106 rad/sec for C603- in A3C60 superconductors, where A is an alkali metal, by analyzing 13C-NMR spectra below 85 K. Combined with an isotropic coupling constant of (2π×0.69)×106 rad/sec, the 2s and 2p characters of the electronic wave functions at the Fermi level were deduced. The results were compatible with local-density-approximation band calculations. From a simulation of 13C-NMR spectra at superconducting state, the traceless chemical (orbital) shift tensor and isotropic chemical shift were determined as (67, 34, -101) ppm and ∼150 ppm, respectively. An estimated magnetic penetration depth is larger than 570 nm in K3C60. Furthermore, the modified Korringa relation, T1TK2∼βS (with Knight shift K, spin-lattice relaxation time T1, and Korringa constant S), clearly showed the existence of weak but substantial antiferromagnetic spin fluctuation in A3C60; β=0.40–0.58 with an error of ±20%.0 The Stoner enhancement factor was also determined as 1–1.5 from a comparison between spin susceptibility obtained from NMR and band-calculation results.

言語

出版者

American Physical Society

言語

eng

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資源タイプ識別子

http://purl.org/coar/resource_type/c_6501

資源タイプ

journal article

出版タイプ

VoR

出版タイプResource

http://purl.org/coar/version/c_970fb48d4fbd8a85

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2025-02-21 04:29:37.738030

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Analysis of 13C-NMR spectra in C60 superconductors : Hyperfine coupling constants, electronic correlation effect, and magnetic penetration depth

× Sato, N.

× Tou, Hideki

× Maniwa, Y.

× Kikuchi, K.

× Suzuki, S.

× Achiba, Y.

× Kosaka, M.

× Tanigaki, K.

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