Electron correlation in the FeSe superconductor studied by bulk-sensitive photoemission spectroscopy

被引：48

作者：

Yamasaki, A. ^{[1
]}

Matsui, Y. ^{[1
]}

Imada, S. ^{[2
]}

Takase, K. ^{[3
]}

Azuma, H. ^{[3
]}

Muro, T. ^{[4
]}

Kato, Y. ^{[4
]}

Higashiya, A. ^{[5
]}

Sekiyama, A. ^{[6
]}

Suga, S. ^{[6
]}

Yabashi, M. ^{[4
]}

Tamasaku, K. ^{[5
]}

Ishikawa, T. ^{[5
]}

Terashima, K. ^{[2
]}

Kobori, H. ^{[1
]}

Sugimura, A. ^{[1
]}

Umeyama, N. ^{[7
,8
]}

Sato, H. ^{[9
]}

Hara, Y. ^{[10
]}

Miyagawa, N. ^{[7
]}

Ikeda, S. I. ^{[8
]}

机构：

[1] Konan Univ, Fac Sci & Engn, Kobe, Hyogo 6588501, Japan

[2] Ritsumeikan Univ, Coll Sci & Engn, Kusatsu 5258577, Japan

[3] Nihon Univ, Coll Sci & Technol, Chiyoda Ku, Tokyo 1018308, Japan

[4] Japan Synchrotron Res Inst, Sayo, Hyogo 6795198, Japan

[5] RIKEN, Sayo, Hyogo 6795148, Japan

[6] Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan

[7] Tokyo Univ Sci, Dept Appl Phys, Shinjuku Ku, Tokyo 1628601, Japan

[8] AIST, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan

[9] Chuo Univ, Fac Sci & Engn, Bunkyo Ku, Tokyo 1128551, Japan

[10] Ibaraki Natl Coll Technol, Hitachinaka, Ibaraki 3128508, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 18期

关键词：

RESOLUTION; STATES;

D O I：

10.1103/PhysRevB.82.184511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the electronic structures of recently discovered superconductor FeSe by soft-x-ray and hard-x-ray photoemission spectroscopy with high-bulk sensitivity. The large Fe 3d spectral weight is located in the vicinity of the Fermi level (E-F), which is demonstrated to be a coherent quasiparticle peak. Compared with the results of the band-structure calculation with local-density approximation, Fe 3d band narrowing and the energy shift of the band toward E-F are found, suggesting an importance of the electron correlation effect in FeSe. The self-energy correction provides the larger mass enhancement value (Z(-1) similar or equal to 3.6) than in Fe-As superconductors and enables us to separate an incoherent part from the spectrum. These features are quite consistent with the results of recent dynamical mean-field calculations, in which the incoherent part is attributed to the lower Hubbard band.

引用

页数：7

共 50 条

[1] Theoretical evidence for strong correlations and incoherent metallic state in FeSe [J].

Aichhorn, Markus ;

Biermann, Silke ;

Miyake, Takashi ;

Georges, Antoine ;

Imada, Masatoshi .

PHYSICAL REVIEW B, 2010, 82 (06)

[2] Dynamical mean-field theory within an augmented plane-wave framework: Assessing electronic correlations in the iron pnictide LaFeAsO [J].

Aichhorn, Markus ;

Pourovskii, Leonid ;

Vildosola, Veronica ;

Ferrero, Michel ;

Parcollet, Olivier ;

Miyake, Takashi ;

Georges, Antoine ;

Biermann, Silke .

PHYSICAL REVIEW B, 2009, 80 (08)

[3] Anisotropic superconducting properties of single-crystalline FeSe0.5Te0.5 [J].

Bendele, M. ;

Weyeneth, S. ;

Puzniak, R. ;

Maisuradze, A. ;

Pomjakushina, E. ;

Conder, K. ;

Pomjakushin, V. ;

Luetkens, H. ;

Katrych, S. ;

Wisniewski, A. ;

Khasanov, R. ;

Keller, H. .

PHYSICAL REVIEW B, 2010, 81 (22)

[4] Pressure Induced Static Magnetic Order in Superconducting FeSe1-x [J].

Bendele, M. ;

Amato, A. ;

Conder, K. ;

Elender, M. ;

Keller, H. ;

Klauss, H. -H. ;

Luetkens, H. ;

Pomjakushina, E. ;

Raselli, A. ;

Khasanov, R. .

PHYSICAL REVIEW LETTERS, 2010, 104 (08)

[5] EFFECTS OF CONFIGURATION INTERACTION ON INTENSITIES AND PHASE SHIFTS [J].

FANO, U .

PHYSICAL REVIEW, 1961, 124 (06) :1866-&

[6]

HARA Y, PHYSICA C IN PRESS

[7] Superconductivity in the PbO-type structure α-FeSe [J].

Hsu, Fong-Chi ;

Luo, Jiu-Yong ;

Yeh, Kuo-Wei ;

Chen, Ta-Kun ;

Huang, Tzu-Wen ;

Wu, Phillip M. ;

Lee, Yong-Chi ;

Huang, Yi-Lin ;

Chu, Yan-Yi ;

Yan, Der-Chung ;

Wu, Maw-Kuen .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (38) :14262-14264

[8] Metal-insulator transitions [J].

Imada, M ;

Fujimori, A ;

Tokura, Y .

REVIEWS OF MODERN PHYSICS, 1998, 70 (04) :1039-1263

[9] Why Does Undoped FeSe Become a High-Tc Superconductor under Pressure? [J].

Imai, T. ;

Ahilan, K. ;

Ning, F. L. ;

McQueen, T. M. ;

Cava, R. J. .

PHYSICAL REVIEW LETTERS, 2009, 102 (17)

[10] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K [J].

Kamihara, Yoichi ;

Watanabe, Takumi ;

Hirano, Masahiro ;

Hosono, Hideo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) :3296-+

← 1 2 3 4 5 →