Unusual pseudogap features observed in iron oxypnictide superconductors

Yukiaki Ishida, Takahiro Shimojima, Kyoko Ishizaka, Takayuki Kiss, Mario Okawa, Tadashi Togashi, Shuntaro Watanabe, Xiaoyang Wang, Chuangtian Chen, Yoichi Kamihara, Masahiro Hirano, Hideo Hosono, Shik Shin

研究成果: Article査読

7 被引用数 (Scopus)

抄録

We present angle-integrated photoemission spectroscopy (PES) study of LaOFeAs:F (Tc = 26 K) and LaOFeP:F (Tc = 5 K) using He I line (h? = 21.2 eV) and laser (h? = 6.994 eV) as excitation light sources. We find quantitatively consistent results between the He I and the laser PES measurements: LaFeAsO:F exhibits a temperature-dependent pseudogap as large as ∼0.1 eV at 300 K, whereas LaFePO:F exhibits a ∼20-meV pseudogap. We discuss possible origin of the T -dependent pseudogap specifically observed in LaFeAsO:F through comparison with other materials that exhibit unusual T -dependent pseudogaps.

本文言語English
ページ(範囲)61-64
ページ数4
ジャーナルJournal of the Physical Society of Japan
77
SUPPL. C
DOI
出版ステータスPublished - 2008
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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