Dielectric evidence for possible type-Ⅱ multiferroicity in α-RuCl3

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2018,（5）
• 页码范围: 73-76
• 页数: 4页
• 语种: 英文

摘要

The Kitaev model in a honeycomb lattice,which has an exactly solvable spin liquid as the ground state [1],has attracted a lot of research interests.Recently,Kitaev-type interactions were discovered in several quasi-2D,honeycomb lattice compounds,such as A2IrO3 (A=Li,Na) [2-7] and α-RuCl3 [8-15].In these compounds,both the spin-orbit coupling and electron correlations play an essential role in the emergent Mott insulator behaviors [2,16-19].Although the ground states of these compounds are magnetically ordered [20-25] due to non-Kitaev interactions,proximate Kitaev spin liquid behavior was proposed at high energies [23-26],whereas the low-energy spin fluctuations are strongly affected by the interplay of non-Kitaev terms [27,28].