THEORY OF SUPERCONDUCTIVITY IN ALKALI-METAL-DOPED FULLERENES | Zendy

Dadong Yan | Zendy; Zhijian Wang | Zendy; XU TIE-FENG | Zendy; Wenzhu Li | Zendy

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THEORY OF SUPERCONDUCTIVITY IN ALKALI-METAL-DOPED FULLERENES

Author(s) -

Dadong Yan,

Zhijian Wang,

XU TIE-FENG,

Wenzhu Li

Publication year - 1994

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.43.1159

Subject(s) - superconductivity , fullerene , condensed matter physics , alkali metal , phonon , intermolecular force , materials science , doping , intramolecular force , spectral line , coupling (piping) , range (aeronautics) , physics , quantum mechanics , molecule , metallurgy , composite material

It is different from the case of conventional superconductors that the alkali-metal-doped fullerenes have wide-frequency-range phonon spectra whose high-and low-frequency phonon modes are, respectively, comparable to the Fermi energy EF and the zero-temperature gap △0. This property will lead to a modification to the theory of conventional strong coupling superconductivity. In this paper, by solving the Eliash-berg equations, the expressions of Tc and △0 are obtained. The results show that both the intermolecular low-frequency modes and the intramolecular highfrequency modes participate the electron-phonon interactions; Tc mainly arise from the high-frequency modes while △0's enhancement mainly arise from the low-frequency modes. So, the experimental results can be explained, especially, the large ratio of △0Bc.

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