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

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（1）
• 页码范围: 20-25
• 页数: 6页
• 语种: 英文

摘要

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.