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

doi:10.1143/JPSJS.77SC.61

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 (T_c = 26 K) and LaOFeP:F (T_c = 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
巻	77
号	SUPPL. C
DOI	https://doi.org/10.1143/JPSJS.77SC.61
出版ステータス	Published - 2008
外部発表	はい

ASJC Scopus subject areas

Physics and Astronomy(all)

文献へのアクセス

10.1143/JPSJS.77SC.61

フィンガープリント「Unusual pseudogap features observed in iron oxypnictide superconductors」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル

Unusual pseudogap features observed in iron oxypnictide superconductors. / Ishida, Yukiaki; Shimojima, Takahiro; Ishizaka, Kyoko; Kiss, Takayuki; Okawa, Mario; Togashi, Tadashi; Watanabe, Shuntaro; Wang, Xiaoyang; Chen, Chuangtian; Kamihara, Yoichi; Hirano, Masahiro; Hosono, Hideo; Shin, Shik.

In: Journal of the Physical Society of Japan, Vol. 77, No. SUPPL. C, 2008, p. 61-64.

研究成果: Article › 査読

Ishida, Yukiaki ; Shimojima, Takahiro ; Ishizaka, Kyoko ; Kiss, Takayuki ; Okawa, Mario ; Togashi, Tadashi ; Watanabe, Shuntaro ; Wang, Xiaoyang ; Chen, Chuangtian ; Kamihara, Yoichi ; Hirano, Masahiro ; Hosono, Hideo ; Shin, Shik. / Unusual pseudogap features observed in iron oxypnictide superconductors. In: Journal of the Physical Society of Japan. 2008 ; Vol. 77, No. SUPPL. C. pp. 61-64.

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title = "Unusual pseudogap features observed in iron oxypnictide superconductors",

abstract = "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.",

keywords = "Iron oxypnicite superconductors, Photoemission spectroscopy, Pseudogap",

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

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T1 - Unusual pseudogap features observed in iron oxypnictide superconductors

AU - Ishida, Yukiaki

AU - Shimojima, Takahiro

AU - Ishizaka, Kyoko

AU - Kiss, Takayuki

AU - Okawa, Mario

AU - Togashi, Tadashi

AU - Watanabe, Shuntaro

AU - Wang, Xiaoyang

AU - Chen, Chuangtian

AU - Kamihara, Yoichi

AU - Hirano, Masahiro

AU - Hosono, Hideo

AU - Shin, Shik

PY - 2008

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AB - 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.

KW - Iron oxypnicite superconductors

KW - Photoemission spectroscopy

KW - Pseudogap

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