Superconducting Properties of MgB<suB>2</suB> with Different Lattice Parameters

Chin. Phys. Lett.

2003, Vol. 20

Issue (7): 1128-1130 DOI:

Original Articles

Superconducting Properties of MgB₂ with Different Lattice Parameters

CHEN Li^1,2;LI Hua¹

¹School of Physics and Microelectronics, Shandong University, Ji’nan 250100 ²Department of Physics, Linyi Teachers University, Linyi 276005

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CHEN Li, LI Hua 2003 Chin. Phys. Lett. 20 1128-1130

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Abstract We investigate the electronic structures and superconductivities of new superconductor MgB₂ with different lattice parameters by means of multiple-scattered-Xα calculation. It is shown that the lattice parameters have great effect on the superconductivity of MgB₂. The results of this paper show that the density of states at the Fermi level decreases with the decreasing lattice parameters. The effects are very more sensitive substantially to the change of the lattice parameter a as compared with that of the lattice parameter c. Correspondingly, the superconducting transition temperature T_c decreases correspondingly mainly with decreasing the lattice parameter a. Our results are in good agreement with the experiments.

Keywords: 74.25.Jb 74.70.Ad

Published: 01 July 2003

PACS:	74.25.Jb	(Electronic structure (photoemission, etc.))
	74.70.Ad	(Metals; alloys and binary compounds)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I7/01128

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