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

[Display omitted] The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca3(Ru0.91Mn0.09)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 th...

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Bibliographic Details
Published in:Science bulletin (Beijing) 2019-01, Vol.64 (1), p.20-25
Main Authors: Xu, Xueli, Peng, Jin, Zhang, Junpei, Ma, Zongwei, Chen, Cheng, Han, Junbo, Liu, Bingjie, Lin, Lingfang, Wu, Xiaoshan, Mao, Zhiqiang, Qu, Zhe, Sheng, Zhigao
Format: Article
Language:English
Subjects:
High magnetic field
Insulator to metal transition
Optical spectroscopy
Ruthenates
Science & Technology - Other Topics
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Summary:[Display omitted] The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca3(Ru0.91Mn0.09)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.
ISSN:2095-9273
DOI:10.1016/j.scib.2018.11.013