High sensitivity of the positron-density distribution to the K doping in C60

Y. Lou, X. Lu, G. H. Dai, W. Y. Ching, Y. N. Xu, M. Z. Huang, P. K. Tseng, Y. C. Jean, R. L. Meng, P. H. Hor, C. W. Chu

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27 引文 斯高帕斯(Scopus)

摘要

Distinct positron lifetimes in C60 and in K3C60 superconductors are observed: a single lifetime (375 ps) in pure C60, and two lifetimes (265 and 425 ps) in K3C60. The positron densities, computed by using the self-consistent orthogonalized linear combination of the atomic-orbital band structure in KxC60 (x=0, 1,2,3, and 6) are presented. The strong dependence of the positron-density distribution on the amount of K doping, varying from interstitital sites outside the ball to the cavity inside the ball, demonstrates the use of the positron to probe local charge densities in C60-based superconductors.

原文English
頁(從 - 到)2644-2647
頁數4
期刊Physical Review B
46
發行號4
DOIs
出版狀態Published - 1992

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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