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http://dx.doi.org/10.5012/bkcs.2013.34.3.912

Relationship Between the Structure and the Superconductivity in LaFeAsO  

Jung, Dongwoon (Department of Chemistry Wonkwang University)
Cho, Sungwoo (Department of Chemistry Wonkwang University)
Lee, In-Ja (Department of Advanced Materials Chemistry, Dongguk University)
Publication Information
Bulletin of the Korean Chemical Society / v.34, no.3, 2013 , pp. 912-916 More about this Journal
Abstract
The electronic structure of LaFeAsO was analyzed by tight-binding band calculation based upon the normal and shrunk lattices. A strong Fermi surface nesting was found in the normal LaFeAsO, while most of the nesting area was disappeared in the shrunk LaFeAsO. It was found, therefore, high pressure atmosphere is required to become a superconductor for LaFeAsO by suppressing the SDW (spin density wave) state through the disappearance of the Fermi surface nesting.
Keywords
Electronic structure; Oxypnictide; Superconductivity; SDW;
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