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원자제어 저차원 전자계 연구단
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Quantum transport evidence of isolated topological nodal-line fermions

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Title
Quantum transport evidence of isolated topological nodal-line fermions
Author(s)
Hoil Kim; Jong Mok Ok; Cha, Seyeong; Jang, Bo Gyu; Chang Il Kwon; Kohama, Yoshimitsu; Kindo, Koichi; Cho, Won Joon; Choi, Eun Sang; Jo, Youn Jung; Kang, Woun; Shim, Ji Hoon; Kim, Keun Su; Jun Sung Kim
Publication Date
2022-11
Journal
Nature Communications, v.13, no.1
Publisher
Nature Research
Abstract
© 2022, The Author(s).Anomalous transport responses, dictated by the nontrivial band topology, are the key for application of topological materials to advanced electronics and spintronics. One promising platform is topological nodal-line semimetals due to their rich topology and exotic physical properties. However, their transport signatures have often been masked by the complexity in band crossings or the coexisting topologically trivial states. Here we show that, in slightly hole-doped SrAs3, the single-loop nodal-line states are well-isolated from the trivial states and entirely determine the transport responses. The characteristic torus-shaped Fermi surface and the associated encircling Berry flux of nodal-line fermions are clearly manifested by quantum oscillations of the magnetotransport properties and the quantum interference effect resulting in the two-dimensional behaviors of weak antilocalization. These unique quantum transport signatures make the isolated nodal-line fermions in SrAs3 desirable for novel devices based on their topological charge and spin transport.
URI
https://pr.ibs.re.kr/handle/8788114/12555
DOI
10.1038/s41467-022-34845-x
ISSN
2041-1723
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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