Phys. Rev. B 78, 085106 (2008) - Electronic structure of multiferroic ${\text{BiFeO}}_{3}$ by resonant soft x-ray emission spectroscopy

Electronic structure of multiferroic ${BiFeO}_{3}$ by resonant soft x-ray emission spectroscopy

Tohru Higuchi, Yi-Sheng Liu, Peng Yao, Per-Anders Glans, Jinghua Guo, Chinglin Chang, Ziyu Wu, Wataru Sakamoto, Naoyuki Itoh, Tetsuo Shimura, Toshinobu Yogo, and Takeshi Hattori

Phys. Rev. B 78, 085106 – Published 6 August 2008

Abstract

The electronic structure of multiferroic ${BiFeO}_{3}$ has been studied using soft x-ray emission spectroscopy. The fluorescence spectra exhibit that the valence band is mainly composed of $O 2 p$ state hybridized with $Fe 3 d$ state. The band gap corresponding to the energy separation between the top of the $O 2 p$ valence band and the bottom of the $Fe 3 d$ conduction band is 1.3 eV. The soft x-ray Raman scattering reflects the features due to the charge-transfer transition from $O 2 p$ valence band to $Fe 3 d$ conduction band. These findings are similar to the result of electronic structure calculation by density-functional theory within the local spin-density approximation that included the effect of Coulomb repulsion between localized $d$ states.

Received 5 March 2008

DOI:https://doi.org/10.1103/PhysRevB.78.085106

©2008 American Physical Society

Authors & Affiliations

Tohru Higuchi^*, Yi-Sheng Liu, Peng Yao, Per-Anders Glans, and Jinghua Guo

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Department of Physics, Tamkang University, Tamsui 251, Taiwan, Republic of China

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China

Wataru Sakamoto, Naoyuki Itoh, Tetsuo Shimura, and Toshinobu Yogo

EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan

Takeshi Hattori

Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan

^*higuchi@rs.kagu.tus.ac.jp. Also at Department of Applied Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan.

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Issue

Vol. 78, Iss. 8 — 15 August 2008

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