Competitions of magnetism and superconductivity in FeAs-based materials
Yang Shuo(杨硕)a)b), You Wen-Long(尤文龙)a), Gu Shi-Jian(顾世建)a), and Lin Hai-Qing(林海青)a)†
a Department of Physics and ITP, The Chinese University of Hong Kong, Hong Kong, China; b Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract Using the numerical unrestricted Hartree--Fock approach, we study the ground state of a two-orbital model describing newly discovered FeAs-based superconductors. We observe the competition of a (0, $\pi$) mode spin-density wave and the superconductivity as the doping concentration changes. There might be a small region in the electron-doping side where the magnetism and superconductivity coexist. The superconducting pairing is found to be spin singlet, orbital even, and coexisting sxy + dx2-y2 wave (even parity).
Received: 06 September 2008
Revised: 09 November 2008
Accepted manuscript online:
PACS:
74.25.Ha
(Magnetic properties including vortex structures and related phenomena)
Fund: Project supported by the Earmarked
Grant for Research from the Research Grants Council of
HKSAR, China (Grant Nos CUHK 402205 and HKU3/05C).
Cite this article:
Yang Shuo(杨硕), You Wen-Long(尤文龙), Gu Shi-Jian(顾世建), and Lin Hai-Qing(林海青) Competitions of magnetism and superconductivity in FeAs-based materials 2009 Chin. Phys. B 18 2545
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
