Mechanism of superconductivity in K3C60

Guanhua Chen; William A. Goddard

doi:10.1073/pnas.90.4.1350

Mechanism of superconductivity in K₃C₆₀

Guanhua Chen, William A. Goddard

California Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Using electronic states and phonon states from the first-principles calculations and including both conventional electron-phonon charge coupling and Jahn-Teller coupling, we predict T_c and other superconducting properties. The only adjustable parameter in the theory is the screening length, R_sc. Using R_sc = 0.8-1.0 Å, we find excellent agreement with experiment for T_c (16-18 K), pressure dependence of T_c (ΔT_c = -6 to -10 K for 1 GPa), and ¹²C to ¹³C isotope shift (α_C = 0.2); experimental values: 19 K, -7 K, and 0.3, respectively.

Original language	English
Pages (from-to)	1350-1353
Number of pages	4
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	90
Issue number	4
DOIs	https://doi.org/10.1073/pnas.90.4.1350
Publication status	Published - 15 Feb 1993
Externally published	Yes

Keywords

Alkali
Buckminsterfullerene
Electron-phonon coupling

Access to Document

10.1073/pnas.90.4.1350

Cite this

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title = "Mechanism of superconductivity in K3C60",

abstract = "Using electronic states and phonon states from the first-principles calculations and including both conventional electron-phonon charge coupling and Jahn-Teller coupling, we predict Tc and other superconducting properties. The only adjustable parameter in the theory is the screening length, Rsc. Using Rsc = 0.8-1.0 {\AA}, we find excellent agreement with experiment for Tc (16-18 K), pressure dependence of Tc (ΔTc = -6 to -10 K for 1 GPa), and 12C to 13C isotope shift (αC = 0.2); experimental values: 19 K, -7 K, and 0.3, respectively.",

keywords = "Alkali, Buckminsterfullerene, Electron-phonon coupling",

author = "Guanhua Chen and Goddard, \{William A.\}",

year = "1993",

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doi = "10.1073/pnas.90.4.1350",

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TY - JOUR

T1 - Mechanism of superconductivity in K3C60

AU - Chen, Guanhua

AU - Goddard, William A.

PY - 1993/2/15

Y1 - 1993/2/15

N2 - Using electronic states and phonon states from the first-principles calculations and including both conventional electron-phonon charge coupling and Jahn-Teller coupling, we predict Tc and other superconducting properties. The only adjustable parameter in the theory is the screening length, Rsc. Using Rsc = 0.8-1.0 Å, we find excellent agreement with experiment for Tc (16-18 K), pressure dependence of Tc (ΔTc = -6 to -10 K for 1 GPa), and 12C to 13C isotope shift (αC = 0.2); experimental values: 19 K, -7 K, and 0.3, respectively.

AB - Using electronic states and phonon states from the first-principles calculations and including both conventional electron-phonon charge coupling and Jahn-Teller coupling, we predict Tc and other superconducting properties. The only adjustable parameter in the theory is the screening length, Rsc. Using Rsc = 0.8-1.0 Å, we find excellent agreement with experiment for Tc (16-18 K), pressure dependence of Tc (ΔTc = -6 to -10 K for 1 GPa), and 12C to 13C isotope shift (αC = 0.2); experimental values: 19 K, -7 K, and 0.3, respectively.

KW - Alkali

KW - Buckminsterfullerene

KW - Electron-phonon coupling

U2 - 10.1073/pnas.90.4.1350

DO - 10.1073/pnas.90.4.1350

M3 - Article

AN - SCOPUS:0027411219

SN - 0027-8424

VL - 90

SP - 1350

EP - 1353

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 4