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Du, Luojun; Huang, Yuan; Wang, Qinqin; Yang, Rong; Tang, Jian; Liao, Mengzhou; Shi, Dongxia; Shi, Youguo; Zhou, Xingjiang; Zhang, Qingming; Zhang, Guangyu; Wang, Yimeng, E-mail: ryang@aphy.iphy.ac.cn, E-mail: qmzhang@ruc.edu.cn, E-mail: gyzhang@iphy.ac.cn2019
AbstractAbstract
[en] Two-dimensional (2D) atomic crystals have made major inroads into condensed-matter physics and give rise to fascinating phenomena due to quantum confinement. Here we report the first Raman scattering study on phonon-magnetic scattering coupling, proximate quantum spin liquid ground state and collective fractionalized excitations in exfoliated α-RuCl3 atomic layers. Our results uncover that 2D α-RuCl3 could harbour the unusual magnetic continuum, serving as a hallmark of the 2D proximate quantum spin liquid state and frustrated magnetic interactions. More importantly, our work demonstrates that the unusual magnetic scattering, as compared with bulk, is more obvious in 2D α-RuCl3, indicating that the frustrated magnetic interactions are enhanced strongly. Such unusual enhancement of frustrated magnetic interactions may be responsible for the gigantic phonon-magnetic scattering coupling of 2D α-RuCl3 and play a key role in stabilizing the 2D proximate quantum spin liquid state. Our work establishes a firm basis for exploring and understanding the 2D proximate quantum spin liquid and fractionalized excitations based on the atomically thin α-RuCl3. (paper)
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Source
Available from http://dx.doi.org/10.1088/2053-1583/aaee29; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
2D Materials; ISSN 2053-1583;
; v. 6(1); [8 p.]

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