论文类型：期刊论文
通讯作者：Zhang Hai-Jun
合写作者：Fang Zhong,Dai Xi,Xu Gang
发表刊物：Chinese Physics Letters
收录刊物：SCI
学科门类：物理学
文献类型：J
卷号：26
期号：1
页面范围：017401
发表时间：2009-01-01
影响因子：0.972
摘要：The Fermi surfaces (FS) of LaOFeAs (in kz = 0 plane) consist of two hole-type circles around Γ point, which do not touch each other, and two electron-type co-centred ellipses around the M point, which are degenerate along the M – X line. By first-principles calculations, here we show that additional degeneracy exists for the two electron-type FS, and the crucial role of F-doping and pressure is to enhance this orbital degeneracy. It is therefore suggested that the inter-orbital fluctuation is important to understand the unconventional superconductivity in these materials.
发布期刊链接：https://iopscience.iop.org/article/10.1088/0256-307X/26/1/017401/meta