Chin. Phys. Lett.  2002, Vol. 19 Issue (8): 1176-1178    DOI:
Original Articles |
Electron-Phonon Coupling in Anion Metallic Solids and Superconducting MgB2
YIN Dao-Le;YANG Fan;QI Zhi;HAN Ru-Shan
Department of Physics, Peking University, Beijing 100871
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YIN Dao-Le, YANG Fan, QI Zhi et al  2002 Chin. Phys. Lett. 19 1176-1178
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Abstract We analyse the Hopfield factor of the newly found superconductor MgB2 using the linear muffin-tin orbital method. Based on a uniform transferred charge density model raised, it is shown from our calculation that the high difference of electronegativity between boron and magnesium favours the high l (l+1) angular momentum hybridization and then the Hopfield factor. Our analysis is consistent with experimental results. Comparison with the cuprate superconductors are also discussed.
Keywords: 74.20.Fg      74.70.Ad      74.25.Jb     
Published: 01 August 2002
PACS:  74.20.Fg (BCS theory and its development)  
  74.70.Ad (Metals; alloys and binary compounds)  
  74.25.Jb (Electronic structure (photoemission, etc.))  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I8/01176
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YIN Dao-Le
YANG Fan
QI Zhi
HAN Ru-Shan
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