Negative charge-transfer energy in SrFeO3 revisited with hard x-ray photoemission spectroscopy

被引：2

作者：

Takegami, D. ^{[1
,2
]}

Nakamura, M. ^{[1
]}

Melendez-Sans, A. ^{[2
]}

Fujinuma, K. ^{[1
]}

Nakamura, R. ^{[1
]}

Yoshimura, M. ^{[3
]}

Tsuei, K. -D. ^{[3
]}

Tanaka, A. ^{[4
]}

Gen, M. ^{[5
]}

Tokunaga, Y. ^{[6
]}

Ishiwata, S. ^{[7
]}

Mizokawa, T. ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Phys, Shinjuku Ku, Tokyo 1698555, Japan

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[4] Hiroshima Univ, Dept Quantum Matter, ADSM, Higashihiroshima 7398530, Japan

[5] RIKEN Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan

[6] Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan

[7] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Osaka 5608531, Japan

来源：

PHYSICAL REVIEW B | 2024年 / 109卷 / 23期

关键词：

ELECTRONIC-STRUCTURE; MAGNETIC-PROPERTIES; BAND-STRUCTURE; 3D; CRYSTAL;

D O I：

10.1103/PhysRevB.109.235138

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report hard x-ray photoelectron spectroscopy on SrFeO3 which is one of the classical conducting transition-metal oxides with a noncollinear magnetic structure. The obtained spectra show a detailed chargetransfer (CT) satellite structure, the Fe 2p3/2 main peak exhibits multiplet splitting, and the deterioration signs present in previous reports are absent here, allowing for a better determination of its intrinsic electronic structure. The results are well described by a FeO6 cluster model with a charge-transfer energy of about -1.0 eV, confirming the values obtained in the previous works. The negative CT energy indicates that the electronic configuration of the tetravalent Fe is d5L rather than d4 where L represents an O 2p hole. The small spectral weight observed at the Fermi level indicates the correlated metallic state with localized Fe 3d electrons and mobile O 2p holes which are governed by a large d-d Coulomb interaction and negative CT energy.

引用

页数：7

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