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Melting of Unidirectional Charge Density Waves across Twin Domain Boundaries in GdTe3

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Title
Melting of Unidirectional Charge Density Waves across Twin Domain Boundaries in GdTe3
Author(s)
Lee, Sanghun; Kim, Eunseo; Bang, Junho; Jongho Park; Changyoung Kim; Dirk Wulferding; Cho, Doohee
Publication Date
2023-11
Journal
Nano Letters, v.23, no.23, pp.11219 - 11225
Publisher
American Chemical Society
Abstract
Solids undergoing a transition from order to disorder experience a proliferation of topological defects. The melting process generates transient quantum states. However, their dynamic nature with a femtosecond lifetime hinders exploration with atomic precision. Here, we suggest an alternative approach to the dynamic melting process by focusing on the interface created by competing degenerate quantum states. We use a scanning tunneling microscope (STM) to visualize the unidirectional charge density wave (CDW) and its spatial progression (“static melting”) across a twin domain boundary (TDB) in the layered material GdTe3. Combining the STM with a spatial lock-in technique, we reveal that the order parameter amplitude attenuates with the formation of dislocations and thus two different unidirectional CDWs coexist near the TDB, reducing the CDW anisotropy. Notably, we discovered a correlation between this anisotropy and the CDW gap. Our study provides valuable insight into the behavior of topological defects and transient quantum states. © 2023 American Chemical Society.
URI
https://pr.ibs.re.kr/handle/8788114/14543
DOI
10.1021/acs.nanolett.3c03721
ISSN
1530-6984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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