Trigonal distortion and charge transfer properties of zigzag-antiferromagnet metal phosphorus trisulfide MPS3
Aldrin Chang1*, Liang-Wei Lan1, Chia-Nung Kuo2, Jau-Wern Chiou3, Ting Chen1, Yao-Jui Chan4, Chih-Heng Huang1, Tzu-Hung Chuang5, Der-Hsin Wei5, Chin-Shan Lue2, Wai-Fung Pong6, Chien-Cheng Kuo1
1Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan
2Department of Physics, National Cheng Kung University, Tainan, Taiwan
3Department of Applied Physics, National University Kaohsiung, Kaohsiung, Taiwan
4Institute of Physics, Academia Sinica, Taipei, Taiwan
5National Synchrotron Radiation Research Center, Hsinchu, Taiwan
6Department of Physics, Tamkang University, New Taipei City, Taiwan
* Presenter:Aldrin Chang,
Trigonal distortion in FePS3 was probed using x-ray absorption spectroscopy and x-ray linear dichroism. This symmetry-lowering as manifested in the polarization-dependent x-ray absorption determined the energy splitting to be around 0.35 eV with egπ as the ground state. Localized and delocalized dipole-forbidden electronic excitations were observed in NiPS3 using resonant inelastic x-ray scattering providing evidence on charge transfer and dd excitations. Established agreement between experiment and theory justified that NiPS3 is a negative charge-transfer insulator. These exotic properties of zigzag-antiferromagnets will prove to be crucial for its potential device and spintronic applications.

Keywords: trigonal distortion, charge transfer, x-ray absorption spectroscopy, resonant inelastic x-ray scattering