Optical spectroscopy study of Ca3(Ru0.91Mn0.09)2O7 single crystal in high magnetic fields

Xueli Xu; Jin Peng; Junpei Zhang; Zongwei Ma; Cheng Chen; Junbo Han; Bingjie Liu; Lingfang Lin; Xiaoshan Wu; Zhiqiang Mao; Zhe Qu; Zhigao Sheng

doi:10.1016/j.scib.2018.11.013

Optical spectroscopy study of Ca₃(Ru_0.91Mn_0.09)₂O₇ single crystal in high magnetic fields

Sci Bull (Beijing). 2019 Jan 15;64(1):20-25. doi: 10.1016/j.scib.2018.11.013. Epub 2018 Nov 24.

Authors

Xueli Xu¹, Jin Peng², Junpei Zhang³, Zongwei Ma⁴, Cheng Chen³, Junbo Han³, Bingjie Liu⁵, Lingfang Lin², Xiaoshan Wu⁶, Zhiqiang Mao⁷, Zhe Qu⁸, Zhigao Sheng⁹

Affiliations

¹ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
² School of Physics, Southeast University, Nanjing 211189, China.
³ Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China.
⁴ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China.
⁵ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China.
⁶ Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China.
⁷ Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA.
⁸ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China. Electronic address: zhequ@hmfl.ac.cn.
⁹ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China. Electronic address: zhigaosheng@hmfl.ac.cn.

PMID: 36659519
DOI: 10.1016/j.scib.2018.11.013

Abstract

The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca₃(Ru_0.91Mn_0.09)₂O₇ (CRMO) single crystal is studied. Both the temperature and magnetic field induced insulator-to-metal transitions (IMTs) are observed via magneto-optical properties of the crystal. The critical magnetic field (H // c) of IMT for CRMO is found to be as large as 35 T at 5 K. The fine structure of optical spectra identified the antiferromagnetic/ferro-orbital-ordering configurations of Ru 4d orbitals at low temperatures. Meanwhile, the configuration of orbital polarization of such double-layer CRMO single crystal is discussed. These results suggest that the orbital degree of freedom plays an important role in the field induced IMT of multi-orbital system.

Keywords: High magnetic field; Insulator to metal transition; Optical spectroscopy; Ruthenates.