@article{2786c12e7b584da799725c644460f940,
title = "Orbital-dependent electric field effect on magnetism in ultrathin cobalt",
abstract = "Electric field modulations of magnetism in ferromagnetic metals are in general ascribed to the electric field effects on the orbitals. However, a direct observation of the electric-field-induced changes in the orbital states of a ferromagnetic metal is lacking. In this Rapid Communication, we demonstrate that an electric field applied to an ultrathin Co film can change the electron occupations according to the orbitals, combining x-ray absorption and x-ray magnetic circularly dichroism spectroscopies with the sum rules. Under a positive electric field, the dxz(yz)-occupied states decrease mainly via the modification of orbital hybridizations, while the dz2-occupied state increases. The changes in the dxz and dyz states dominantly alter the Curie temperature.",
author = "Yamada, {Kihiro T.} and Yoichi Shiota and Tomohiro Koyama and Yoshinori Kotani and Kentaro Toyoki and Hayato Mizuno and Fuyuki Ando and Kohji Nakamura and Tetsuya Nakamura and Daichi Chiba and Teruo Ono",
note = "Funding Information: We thank S. Kim, K.-J. Kim, M. Suzuki, and T. Moriyama for the fruitful discussions and Y. Hibino for offering us the reference spectrum. This work was partly supported by JSPS KAKENHI (Grants No. 15H05702, No. 25220604, No. 26103002, No. 14J08822, No. 19H00860, and No. 16H05977), ImPACT Program of CSTI, Spintronics Research Network of Japan, and Collaborative Research Program of the Institute for Chemical Research, Kyoto University. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposals No. 2015B0902, No. 2016A0902, No. 2016B0117, and No. 2018A1225). Funding Information: This work was partly supported by JSPS KAKENHI (Grants No. 15H05702, No. 25220604, No. 26103002, No. 14J08822, No. 19H00860, and No. 16H05977), ImPACT Program of CSTI, Spintronics Research Network of Japan, and Collaborative Research Program of the Institute for Chemical Research, Kyoto University. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposals No. 2015B0902, No. 2016A0902, No. 2016B0117, and No. 2018A1225). Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = sep,
doi = "10.1103/PhysRevB.102.100407",
language = "English",
volume = "102",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "10",
}