Topological nodal-line fermions in spin-orbit metal PbTaSe2

Bian, Guang; Chang, Tay-Rong; Sankar, Raman; Xu, Su-Yang; Zheng, Hao; Neupert, Titus; Chiu, Ching-Kai; Huang, Shin-Ming; Chang, Guoqing; Belopolski, Ilya; Sanchez, Daniel S.; Neupane, Madhab; Alidoust, Nasser; Liu, Chang; Wang, BaoKai; Lee, Chi-Cheng; Jeng, Horng-Tay; Zhang, Chenglong; Yuan, Zhujun; Jia, Shuang; Bansil, Arun; Chou, Fangcheng; Lin, Hsin; Hasan, M. Zahid

doi:10.1038/ncomms10556

Title: Topological nodal-line fermions in spin-orbit metal PbTaSe2

Journal Article · Tue Feb 02 00:00:00 EST 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms10556· OSTI ID:1311503

Bian, Guang; Chang, Tay-Rong; Sankar, Raman; Xu, Su-Yang;

;

; Chiu, Ching-Kai;

;

; Belopolski, Ilya; Sanchez, Daniel S.; Neupane, Madhab; Alidoust, Nasser; Liu, Chang;

; Lee, Chi-Cheng; Jeng, Horng-Tay; Zhang, Chenglong;

; Jia, Shuang more »

Here we discuss how topological semimetals can support one-dimensional Fermi lines or zero-dimensional Weyl points in momentum space, where the valence and conduction bands touch. While the degeneracy points in Weyl semimetals are robust against any perturbation that preserves translational symmetry, nodal lines require protection by additional crystalline symmetries such as mirror reflection. Here we report, based on a systematic theoretical study and a detailed experimental characterization, the existence of topological nodal-line states in the non-centrosymmetric compound PbTaSe₂ with strong spin-orbit coupling. Remarkably, the spin-orbit nodal lines in PbTaSe₂ are not only protected by the reflection symmetry but also characterized by an integer topological invariant. Our detailed angle-resolved photoemission measurements, first-principles simulations and theoretical topological analysis illustrate the physical mechanism underlying the formation of the topological nodal-line states and associated surface states for the first time, thus paving the way towards exploring the exotic properties of the topological nodal-line fermions in condensed matter systems.

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Research Organization:: Northeastern Univ., Boston, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-07ER46352

OSTI ID:: 1311503

Journal Information:: Nature Communications, Vol. 7; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 617 works

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Topological nodal-line semimetals in ferromagnetic rare-earth-metal monohalides Nie, Simin; Weng, Hongming; Prinz, Fritz B. arXiv https://doi.org/10.48550/arxiv.1803.08486	text	January 2018
Non-Abelian band topology in noninteracting metals Wu, QuanSheng; Soluyanov, Alexey A.; Bzdušek, Tomáš arXiv https://doi.org/10.48550/arxiv.1808.07469	text	January 2018
Weak Localization and Antilocalization in Nodal-Line Semimetals: Dimensionality and Topological Effects Chen, Wei; Lu, Hai-Zhou; Zilberberg, Oded arXiv https://doi.org/10.48550/arxiv.1902.06921	text	January 2019
Topological bound states for quantum charges Paiva, Ismael L.; Aharonov, Yakir; Tollaksen, Jeff arXiv https://doi.org/10.48550/arxiv.1904.10542	text	January 2019
Exploring Topological Superconductivity in Topological Materials Li, Yupeng; Xu, Zhu-An arXiv https://doi.org/10.48550/arxiv.1907.04493	text	January 2019
Angle-dependent magnetoresistance and its implications for Lifshitz transition in W2As3 Wang, Jialu; Yang, Haiyang; Ding, Linchao arXiv https://doi.org/10.48550/arxiv.2004.00314	text	January 2020
Realization of a Type-II Nodal-Line Semimetal in Mg ₃ Bi ₂ Chang, Tay-Rong; Pletikosic, Ivo; Kong, Tai Advanced Science, Vol. 6, Issue 4 https://doi.org/10.1002/advs.201800897	journal	November 2018
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Three-Dimensional Anisotropic Magnetoresistance in the Dirac Node-Line Material ZrSiSe Pan, Haiyang; Tong, Bingbing; Yu, Jihai arXiv https://doi.org/10.48550/arxiv.1708.02779	preprint	January 2017
Emergence of Topological insulator and Nodal line semi-metal states in XX'Bi (X=Na, K, Rb, Cs; X'=Ca, Sr) Mondal, Chiranjit; Barman, C. K.; Kumar, Sourabh arXiv https://doi.org/10.48550/arxiv.1804.02225	text	January 2018
Quasiparticle Properties under Interactions in Weyl and Nodal Line Semimetals Kang, Jing; Zou, Jianfei; Li, Kai arXiv https://doi.org/10.48550/arxiv.1903.00170	text	January 2019

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