### Abstract

The electronic part (the Hopfield factor) of the electron-phonon coupling constant for alkali-metal-doped fullerenes A3C60 is calculated within the rigid muffin-tin-potential approximation. It is found that is large for tangential atomic motions, while for the radial vibrations is 20 times smaller. We have calculated for three lattice constants (a=14.1, 14.4, and 14.6) corresponding approximately to those of C60, Rb3C60, and (hypothetical) Cs3C60, and found =21, 32, and 36 eV/Ai2. Using semiempirical nearest-neighbor force constants we estimated =0.49, 0.77, and 0.83, and log=870 cm-1 for the average phonon frequency. The McMillan formula yields Tc=5, 36, and 44 K for these lattice constants, in reasonable agreement with the available experimental data. The relatively high-temperature superconductivity in A3C60, as well as the strong dependence of Tc on the dopant, is fully explained within the framework of the conventional superconductivity theory.

Original language | English |
---|---|

Pages (from-to) | 5114-5117 |

Number of pages | 4 |

Journal | Physical Review B |

Volume | 45 |

Issue number | 9 |

DOIs | |

Publication status | Published - 1 Dec 1992 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

*Physical Review B*,

*45*(9), 5114-5117. https://doi.org/10.1103/PhysRevB.45.5114

**Quantitative theory of superconductivity in doped C60.** / Mazin, I. I.; Rashkeev, Sergey; Antropov, V. P.; Jepsen, O.; Liechtenstein, A. I.; Andersen, O. K.

Research output: Contribution to journal › Article

*Physical Review B*, vol. 45, no. 9, pp. 5114-5117. https://doi.org/10.1103/PhysRevB.45.5114

}

TY - JOUR

T1 - Quantitative theory of superconductivity in doped C60

AU - Mazin, I. I.

AU - Rashkeev, Sergey

AU - Antropov, V. P.

AU - Jepsen, O.

AU - Liechtenstein, A. I.

AU - Andersen, O. K.

PY - 1992/12/1

Y1 - 1992/12/1

N2 - The electronic part (the Hopfield factor) of the electron-phonon coupling constant for alkali-metal-doped fullerenes A3C60 is calculated within the rigid muffin-tin-potential approximation. It is found that is large for tangential atomic motions, while for the radial vibrations is 20 times smaller. We have calculated for three lattice constants (a=14.1, 14.4, and 14.6) corresponding approximately to those of C60, Rb3C60, and (hypothetical) Cs3C60, and found =21, 32, and 36 eV/Ai2. Using semiempirical nearest-neighbor force constants we estimated =0.49, 0.77, and 0.83, and log=870 cm-1 for the average phonon frequency. The McMillan formula yields Tc=5, 36, and 44 K for these lattice constants, in reasonable agreement with the available experimental data. The relatively high-temperature superconductivity in A3C60, as well as the strong dependence of Tc on the dopant, is fully explained within the framework of the conventional superconductivity theory.

AB - The electronic part (the Hopfield factor) of the electron-phonon coupling constant for alkali-metal-doped fullerenes A3C60 is calculated within the rigid muffin-tin-potential approximation. It is found that is large for tangential atomic motions, while for the radial vibrations is 20 times smaller. We have calculated for three lattice constants (a=14.1, 14.4, and 14.6) corresponding approximately to those of C60, Rb3C60, and (hypothetical) Cs3C60, and found =21, 32, and 36 eV/Ai2. Using semiempirical nearest-neighbor force constants we estimated =0.49, 0.77, and 0.83, and log=870 cm-1 for the average phonon frequency. The McMillan formula yields Tc=5, 36, and 44 K for these lattice constants, in reasonable agreement with the available experimental data. The relatively high-temperature superconductivity in A3C60, as well as the strong dependence of Tc on the dopant, is fully explained within the framework of the conventional superconductivity theory.

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UR - http://www.scopus.com/inward/citedby.url?scp=0000407372&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.45.5114

DO - 10.1103/PhysRevB.45.5114

M3 - Article

VL - 45

SP - 5114

EP - 5117

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 9

ER -