Indexed by: Journal paper

Correspondence Author: Zhang Hai-Jun

Co-author: Fang Zhong,Dai Xi,Xu Gang

Journal: Chinese Physics Letters

Included Journals: SCI

Discipline: 物理学

Document Type: J

Volume: 26

Issue: 1

Page Number: 017401

Date of Publication: 2009-01-01

Impact Factor: 0.972

Abstract: 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.

Links to published journals: https://iopscience.iop.org/article/10.1088/0256-307X/26/1/017401/meta