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Topological soliton molecule in quasi 1D charge density wave

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Title
Topological soliton molecule in quasi 1D charge density wave
Author(s)
Taehwan Im; Sun Kyu Song; Jae Whan Park; Han Woong Yeom
Publication Date
2023-08
Journal
Nature Communications, v.14, no.1
Publisher
Nature Publishing Group
Abstract
Soliton molecules, bound states of two solitons, can be important for the informatics using solitons and the quest for exotic particles in a wide range of physical systems from unconventional superconductors to nuclear matter and Higgs field, but have been observed only in temporal dimension for classical wave optical systems. Here, we identify a topological soliton molecule formed spatially in an electronic system, a quasi 1D charge density wave of indium atomic wires. This system is composed of two coupled Peierls chains, which are endowed with a Z(4) topology and three distinct, right-chiral, left-chiral, and non-chiral, solitons. Our scanning tunneling microscopy measurements identify a bound state of right- and left-chiral solitons with distinct in-gap states and net zero phase shift. Our density functional theory calculations reveal the attractive interaction of these solitons and the hybridization of their electronic states. This result initiates the study of the interaction between solitons in electronic systems, which can provide novel manybody electronic states and extra data-handling capacity beyond the given soliton topology.
URI
https://pr.ibs.re.kr/handle/8788114/14911
DOI
10.1038/s41467-023-40834-5
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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