Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO

Details Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO

2011-08-02

arxiv.org/abs/1108.0585v2

J. Phys. Soc. Jpn. 80 (2011) 123701

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1143/JPSJ.80.123701

We study how Co- and Ni-substitution affect the electronic structure of the iron-based superconductor, LaFeAsO. We perform {\it ab initio} supercell calculations and unfold the first Brillouin zone (BZ) to calculate the spectral function in the BZ for the normal cell. The charge density distribution in real space shows that doped extra electrons are trapped around Co (Ni) atom. This seems to mean that Co(Ni)-substitution does not work as carrier doping. However, the present momentum-space analysis indicates that the Fermi-surface volume indeed expands by substitutions, which can be well described by the rigid-band shift. By taking into account this effective doping, we discuss whether the sign-reversing s-wave ($s_{\pm}$-wave) scenario is compatible with experiments.

Affiliated with

Also associated with

No associations

Rating

Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-510204