Phonon spectra and superconductivity of the BiS2-based compounds LaO1−xFxBiS2

Phonon spectra and superconductivity of the BiS2-based compounds LaO1−xFxBiS2

Using the density-functional perturbation theory with structural optimization, we investigate the electronic structure, phonon spectra, and superconductivity of the BiS2-based layered compounds LaO1−xFxBiS2. For LaO0.5F0.5BiS2, the calculated electron-phonon coupling constant is equal to λ = 0.8, an...

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Veröffentlicht in:Europhysics letters 2013-02, Vol.101 (4)
Hauptverfasser: Li, B., Xing, Z. W., Huang, G. Q.
Format: Artikel
Sprache:eng
Schlagworte:
63.20.kd
74.20.Pq
74.25.Kc
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Zusammenfassung:Using the density-functional perturbation theory with structural optimization, we investigate the electronic structure, phonon spectra, and superconductivity of the BiS2-based layered compounds LaO1−xFxBiS2. For LaO0.5F0.5BiS2, the calculated electron-phonon coupling constant is equal to λ = 0.8, and the obtained Tc 9.1 K is very close to its experimental value, indicating that it is a conventional electron-phonon superconductor.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/101/47002