Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy

被引：34

作者：

Yoshida, Rikiya ^{[1
]}

Wakita, Takanori ^{[2
,3
]}

Okazaki, Hiroyuki ^{[1
]}

Mizuguchi, Yoshikazu ^{[4
,5
]}

Tsuda, Shunsuke ^{[3
,4
,6
]}

Takano, Yoshihiko ^{[3
,4
,5
]}

Takeya, Hiroyuki ^{[4
]}

Hirata, Kazuto ^{[4
]}

Muro, Takayuki ^{[7
]}

Okawa, Mario ^{[8
]}

Ishizaka, Kyoko ^{[8
]}

Shin, Shik ^{[8
,9
]}

Harima, Hisatomo ^{[3
,10
]}

Hirai, Masaaki ^{[1
,2
,3
]}

Muraoka, Yuji ^{[1
,2
,3
]}

Yokoya, Takayoshi ^{[1
,2
,3
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan

[2] Okayama Univ, Surface Sci Res Lab, Okayama 7008530, Japan

[3] JST, Transormat Res Project Iron Pnictides TRIP, Tokyo 1020075, Japan

[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[5] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan

[6] Natl Inst Mat Sci, WPI, MANA, Tsukuba, Ibaraki 3050044, Japan

[7] Japan Synchrotron Radiat Res Inst JASRI, Sayo, Hyogo 6795198, Japan

[8] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[9] RIKEN, Inst Phys & Chem Res, Sayo, Hyogo 6795143, Japan

[10] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2009年 / 78卷 / 03期

关键词：

iron-based superconductor; FeSe; electronic structure; photoemission spectroscopy;

D O I：

10.1143/JPSJ.78.034708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have pet-formed soft x-ray and Ultralligh-resolution laser-excited photoemission measurements on tetragonal FeSe, which was recently identified as a superconductor. Energy dependent study of valence band is compared to band Structure Calculations and yields a reasonable assignment of partial densities of states. However, the sharp peak near the Fermi level slightly deviates from the calculated energy position, giving rise to the necessity of self energy correction. We have also performed ultrahigh-resolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

引用

页数：4

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