| Title | Probing the continuum scattering and magnetic collapse in single-crystalline alpha-Li2IrO3 by Raman spectroscopy |
| Authors | Li, Gaomin Huang, Liang-Long Chen, Xiaobin Liu, Cai Pei, Shenghai Wang, Xinwei Wang, Shanmin Zhao, Yusheng Yu, Dapeng Wang, Le Ye, Fei Mei, Jia-Wei Huang, Mingyuan |
| Affiliation | Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China |
| Keywords | SPIN LIQUID |
| Issue Date | 22-May-2020 |
| Publisher | PHYSICAL REVIEW B |
| Abstract | Raman spectroscopy has been applied to investigate the lattice and magnetic excitations of the honeycomb Kitaev material alpha-Li2IrO3. The temperature-dependent Raman spectra give evidence for an unusual magnetic excitation, typified by a broad continuum. The integrated intensity of this Raman continuum does not follow the bosonic statistics expected for the conventional insulating magnets, which indicates the emergence of itinerant Majorana fermions from spin fractionalization in alpha-Li2IrO3. In addition, the Raman results under pressures resolve one critical pressure at P-c = 4.1GPa with structural and magnetic phase transitions, signaled by the in-plane Ir-Ir bond dimerization and magnetic collapse, and the system turns into a correlated band insulator above P-c. |
| URI | http://hdl.handle.net/20.500.11897/589181 |
| ISSN | 2469-9950 |
| DOI | 10.1103/PhysRevB.101.174436 |
| Indexed | SCI(E) |
| Appears in Collections: | 新材料学院 |
