Electron-Phonon Coupling in Anion Metallic Solids and Superconducting MgB<suB>2</suB>

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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