Photoemission and Hartree-Fock studies of oxygen-hole ordering in charge-disproportionated La1-xSrxFeO3

被引：66

作者：

Matsuno, J ^{[1
]}

Mizokawa, T

Fujimori, A

Mamiya, K

Takeda, Y

Kawasaki, S

Takano, M

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] High Energy Accelerators Res Org, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[3] Mie Univ, Dept Chem, Tsu, Mie 5148507, Japan

[4] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.60.4605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the "charge disproportionation" phenomenon in La1-xSrxFeO3 by photoemission spectroscopy and unrestricted Hartree-Fock band-structure calculations. We find a systematic decrease of the spectral intensity near Fermi level (E-F) toward x = 0.67, where the charge disproportion is most stabilized. The spectra for x = 0.67 show the dearest temperature-dependent changes in the vicinity of E-F across the transition corresponding to the charge ordering of ''Fe3+'':''Fe5+'' = 2:1. The Hartree-Fock calculations indicate that ordering of oxygen holes indeed occurs in the charge disproportionated state. [S0163-1829(99)07831-5].

引用

页码：4605 / 4608

页数：4

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