Electronic properties of K3C60 studied by 13C nuclear-magnetic-resonance spectra

Susumu Sasaki, Azusa Matsuda, C. W. Chu

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

13C nuclear-magnetic-resonance (NMR) spectra are obtained to investigate the electronic properties of a superconducting fulleride K3C60. Asymmetric line shapes below 235 K are reproduced by the powder patterns of anisotropic NMR frequency shifts (K1) of electronic single-site. The temperature (T) dependence of K1 indicates that the 13C hyperfine coupling (Aspin) has both an isotropic part (Aisospin) and an anisotropic part (Aaxspin) with Aisospin/Aaxspin = 0.78. Substantial decrease in the spin susceptibility (i.e. Xspin(Tc)/Xspin(300K) = 0.55) is not explained by the lattice contraction alone. The Knight shift values can be deduced experimentally without assuming the chemical shift values, since our analysis shows that the line shapes below Tc are affected negligibly by the magnetic-field distribution, which is consistent with the large penetration depth. We also showed the validity and consistency of our analysis.

原文English
頁(從 - 到)223-237
頁數15
期刊Physica C: Superconductivity and its applications
278
發行號3-4
DOIs
出版狀態Published - 1997 5月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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