期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms13774
关键词
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资金
- Division of Materials Sciences and Engineering, Basic Energy Sciences, Department of Energy
- Scientific User Facilities Division, Office of Science, Basic Energy Sciences, U.S. Department of Energy
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4416]
- Office of Science of the U.S. DOE [DE-AC02-05CH11231]
- UT/ORNL Bredesen Center for Interdisciplinary Research and Graduate Education
- Center for Nanophase Materials Sciences
A pseudospin-1/2 Mott phase on a honeycomb lattice is proposed to host the celebrated two-dimensional Kitaev model which has an elusive quantum spin liquid ground state, and fascinating physics relevant to the development of future templates towards topological quantum bits. Here we report a comprehensive, atomically resolved real-space study by scanning transmission electron and scanning tunnelling microscopies on a novel layered material displaying Kitaev physics, alpha-RuCl3. Our local crystallography analysis reveals considerable variations in the geometry of the ligand sublattice in thin films of alpha-RuCl3 that opens a way to realization of a spatially inhomogeneous magnetic ground state at the nanometre length scale. Using scanning tunnelling techniques, we observe the electronic energy gap of approximate to 0.25 eV and intra-unit cell symmetry breaking of charge distribution in individual alpha-RuCl3 surface layer. The corresponding charge-ordered pattern has a fine structure associated with two different types of charge disproportionation at Cl-terminated surface.
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