Band structure of the heavily-electron-doped FeAs-based Ba(Fe,Co) 2As2 Superconductor suppresses antiferromagnetic correlations

T. Sudayama, Y. Wakisaka, K. Takubo, R. Morinaga, T. J. Sato, M. Arita, H. Namatame, M. Taniguchi, Takashi Mizokawa

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Abstract

In the heavily-electron-doped regime of the Ba(Fe,Co)2As 2 superconductor, three hole bands at the zone center are observed and two of them reach the Fermi level. The larger hole pocket at the zone center is apparently nested with the smaller electron pocket around the zone corner. However, the (π,0) Fermi surface reconstruction reported for the hole-doped case is absent in the heavily-electron-doped case. This observation shows that the apparent Fermi surface nesting alone is not enough to enhance the antiferromagnetic correlation as well as the superconducting transition temperature.

Original languageEnglish
Article number177002
JournalPhysical Review Letters
Volume104
Issue number17
DOIs
Publication statusPublished - 2010 Apr 28
Externally publishedYes

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Fermi surfaces
electrons
transition temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Band structure of the heavily-electron-doped FeAs-based Ba(Fe,Co) 2As2 Superconductor suppresses antiferromagnetic correlations. / Sudayama, T.; Wakisaka, Y.; Takubo, K.; Morinaga, R.; Sato, T. J.; Arita, M.; Namatame, H.; Taniguchi, M.; Mizokawa, Takashi.

In: Physical Review Letters, Vol. 104, No. 17, 177002, 28.04.2010.

Research output: Contribution to journalArticle

Sudayama, T. ; Wakisaka, Y. ; Takubo, K. ; Morinaga, R. ; Sato, T. J. ; Arita, M. ; Namatame, H. ; Taniguchi, M. ; Mizokawa, Takashi. / Band structure of the heavily-electron-doped FeAs-based Ba(Fe,Co) 2As2 Superconductor suppresses antiferromagnetic correlations. In: Physical Review Letters. 2010 ; Vol. 104, No. 17.
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AU - Namatame, H.

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