Optical spectroscopy study of Ca_3(Ru_(0.91)Mn_(0.09))_2O_7 single crystal in high magnetic fields  

Optical spectroscopy study of Ca_3(Ru_(0.91)Mn_(0.09))_2O_7 single crystal in high magnetic fields

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

机构地区:[1]Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences [2]University of Science and Technology of China [3]Collaborative Innovation Center of Advanced Microstructures, Nanjing University [4]School of Physics, Southeast University [5]Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology [6]School of Physics, Nanjing University [7]Department of Physics and Engineering Physics, Tulane University

出  处:《Science Bulletin》2019年第1期20-25,共6页科学通报(英文版)

基  金:supported by the National Key R&D Program of China (2017YFA0303603 and 2016YFA0401803);the National Natural Science Foundation of China (U1532153, U1532155, 11574316 and 11774352);the Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-SLH011);Innovative Program of Hefei Science Center CAS (2016FXCX002 and 2016HSC-IU006);the Major Program of Development Foundation of Hefei Center for Physical Science and Technology (2016FXZY001);the One Thousand Youth Talents Program of China;Work at Nanjing University was supported by the National Natural Science Foundation of China (11304149 and U1332205);was supported by the Fundamental Research Funds for the Central Universities of China

摘  要:The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca_3(Ru_(0.91)Mn_(0.09))_2O_7(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.The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca_3(Ru_(0.91)Mn_(0.09))_2O_7(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.

关 键 词:RUTHENATES High magnetic field OPTICAL SPECTROSCOPY INSULATOR to metal transition 

分 类 号:N[自然科学总论]

 

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