Publication Date:
2015-10-10
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheon, Sangmo -- Kim, Tae-Hwan -- Lee, Sung-Hoon -- Yeom, Han Woong -- New York, N.Y. -- Science. 2015 Oct 9;350(6257):182-5. doi: 10.1126/science.aaa7055.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Korea. ; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Korea. Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea. ; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Korea. shlee@ibs.re.kr yeom@postech.ac.kr. ; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Korea. Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea. shlee@ibs.re.kr yeom@postech.ac.kr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26450206" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
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Medicine
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Natural Sciences in General
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Physics
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