Emergence of low-energy electronic states in oxygen-controlled Mott insulator Ca2RuO4+δ

Abstract

Takeo Miyashita, Hideaki Iwasawa, Tomoki Yoshikawa, Shusuke Ozawa, Hironoshin Oda, Takayuki Muro, Hiroki Ogura, Tatsuhiro Sakami, Fumihiko Nakamura, and Akihiro Ino 5, ∗ Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan; Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan Kurume Institute of Technology, 2228-66 Kamitsu, Kurume, Fukuoka 830-0052, Japan Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan (Dated: February 3, 2021)