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Robust Luttinger Liquid State of 1D Dirac Fermions in a Van der Waals System Nb9Si4Te18

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Title
Robust Luttinger Liquid State of 1D Dirac Fermions in a Van der Waals System Nb9Si4Te18
Author(s)
Qirong Yao; Hyunjin Jung; Kijeong Kong; Chandan De; Jaeyoung Kim; Denlinger, Jonathan D.; Han Woong Yeom
Publication Date
2023-08
Journal
Nano Letters, v.23, no.17, pp.7961 - 7967
Publisher
American Chemical Society
Abstract
We report on the Tomonaga-Luttinger liquid (TLL) behavior in fully degenerate 1D Dirac Fermions. A ternary van der Waals material Nb9Si4Te18 incorporates in-plane NbTe2 chains, which produce a 1D Dirac band crossing Fermi energy. Tunneling conductance of electrons confined within NbTe2 chains is found to be substantially suppressed at Fermi energy, which follows a power law with a universal temperature scaling, hallmarking a TLL state. The obtained Luttinger parameter of ∼0.15 indicates a strong electron-electron interaction. The TLL behavior is found to be robust against atomic-scale defects, which might be related to the Dirac electron nature. These findings, combined with the tunability of the compound and the merit of a van der Waals material, offer a robust, tunable, and integrable platform to exploit non-Fermi liquid physics. © 2023 American Chemical Society.
URI
https://pr.ibs.re.kr/handle/8788114/14077
DOI
10.1021/acs.nanolett.3c01789
ISSN
1530-6984
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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