Chiral solitons in a coupled double Peierls chain
- Title
- Chiral solitons in a coupled double Peierls chain
- Author
- 천상모
- Keywords
- CONJUGATED DIATOMIC POLYMER; QUANTIZED HALL CONDUCTANCE; TOPOLOGICAL INSULATORS; CHARGE; INSTABILITY; TRANSPORT; SURFACE
- Issue Date
- 2015-10
- Publisher
- AMER ASSOC ADVANCEMENT SCIENCE
- Citation
- SCIENCE, v. 350, NO 6257, Page 182-185
- Abstract
- Chiral edge states are the hallmark of two-and three-dimensional topological materials, but their one-dimensional (1D) analog has not yet been found. We report that the 1D topological edge states, solitons, of the charge density wave system of indium atomic wires self-assembled on a silicon surface have chirality. The system is described by a coupled double Peierls-dimerized atomic chain, where the interchain coupling induces dynamical sublattice symmetry breaking. This changes its topological symmetry from Z(2) x Z(2) to Z(4) and endows solitons with a chiral degree of freedom. Chiral solitons can produce quantized charge transport across the chain that is topologically protected and controllable by the soliton's chirality. Individual right-and left-chiral solitons in indium wires are directly identified by scanning tunneling microscopy.
- URI
- http://science.sciencemag.org/content/350/6257/182http://hdl.handle.net/20.500.11754/28254
- ISSN
- 0036-8075; 1095-9203
- DOI
- 10.1126/science.aaa7055
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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