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Switching chiral solitons for algebraic operation of topological quaternary digits

Title
Switching chiral solitons for algebraic operation of topological quaternary digits
Author
천상모
Keywords
MAGNETIC SKYRMIONS; POLYACETYLENE; LATTICE; STABILITY; MOTION
Issue Date
2017-05
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE PHYSICS, v. 13, no. 5, page. 444-447
Abstract
Chiral objects can be found throughout nature(1-4); in condensed matter chiral objects are often excited states protected by a system's topology. The use of chiral topological excitations to carry information has been demonstrated, where the information is robust against external perturbations(5,6). For instance, reading, writing, and transfer of binary information have been demonstrated with chiral topological excitations in magnetic systems, skyrmions(7-14), for spintronic devices(13-19). The next step is logic or algebraic operations of such topological bits(20-22). Here, we show experimentally the switching between chiral topological excitations or chiral solitons of different chirality in a one-dimensional electronic system with Z(4) topological symmetry(23,24). We found that a fast-moving achiral soliton merges with chiral solitons to switch their handedness. This can lead to the realization of algebraic operation of Z(4) topological charges(25). Chiral solitons could be a platform for storage and operation of robust topological multi-digit information.
URI
https://www.nature.com/articles/nphys4026https://repository.hanyang.ac.kr/handle/20.500.11754/114062
ISSN
1745-2473; 1745-2481
DOI
10.1038/NPHYS4026
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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