BROWSE

Related Scientist

Park, Jae Whan's photo.

Park, Jae Whan
원자제어 저차원 전자계 연구단
more info

ITEM VIEW & DOWNLOAD

Creation and annihilation of mobile fractional solitons in atomic chains

Cited 0 time in webofscience Cited 0 time in scopus
167 Viewed 0 Downloaded
Title
Creation and annihilation of mobile fractional solitons in atomic chains
Author(s)
Jae Whan Park; Euihwan Do; Sun Kyu Song; Stetsovych, Oleksandr; Jin Sung Shin; Jelinek, Pavel; Han Woong Yeom
Publication Date
2022-03
Journal
Nature Nanotechnology, v.17, no.3, pp.244 - 249
Publisher
Nature Publishing Group
Abstract
The movement of fractionalized phase defects, that can be considered as fractional solitons promising for future information technology, is observed in atomic chains formed along step edges of silicon surfaces, solitons may serve as robust, topologically protected information carriers in future information technology Localized modes in one-dimensional (1D) topological systems, such as Majonara modes in topological superconductors, are promising candidates for robust information processing. While theory predicts mobile integer and fractional topological solitons in 1D topological insulators, experiments so far have unveiled immobile, integer solitons only. Here we observe fractionalized phase defects moving along trimer silicon atomic chains formed along step edges of a vicinal silicon surface. By means of tunnelling microscopy, we identify local defects with phase shifts of 2 pi/3 and 4 pi/3 with their electronic states within the band gap and with their motions activated above 100 K. Theoretical calculations reveal the topological soliton origin of the phase defects with fractional charges of +/- 2e/3 and +/- 4e/3. Additionally, we create and annihilate individual solitons at desired locations by current pulses from the probe tip. Mobile and manipulable topological solitons may serve as robust, topologically protected information carriers in future information technology.
URI
https://pr.ibs.re.kr/handle/8788114/11590
DOI
10.1038/s41565-021-01042-8
ISSN
1748-3387
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse