Topological nodal-line fermions in spin-orbit metal PbTaSe2

Guang Bian, Tay-Rong Chang, Raman Sankar, Su-Yang Xu, Hao Zheng, Titus Neupert, Ching-Kai Chiu, Shin-Ming Huang, Guoqing Chang, Ilya Belopolski, Daniel S. Sanchez, Madhab Neupane, Nasser Alidoust, Chang Liu, BaoKai Wang, Chi-Cheng Lee, Horng-Tay Jeng, Chenglong Zhang, Zhujun Yuan, Shuang Jia, Arun Bansil, Fangcheng Chou, Hsin Lin and M. Zahid Hasan ()
Additional contact information
Guang Bian: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Tay-Rong Chang: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Raman Sankar: Center for Condensed Matter Sciences, National Taiwan University
Su-Yang Xu: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Hao Zheng: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Titus Neupert: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Ching-Kai Chiu: University of British Columbia
Shin-Ming Huang: Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore
Guoqing Chang: Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore
Ilya Belopolski: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Daniel S. Sanchez: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Madhab Neupane: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Nasser Alidoust: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
Chang Liu: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University
BaoKai Wang: Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore
Chi-Cheng Lee: Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore
Horng-Tay Jeng: National Tsing Hua University
Chenglong Zhang: ICQM, School of Physics, Peking University
Zhujun Yuan: ICQM, School of Physics, Peking University
Shuang Jia: ICQM, School of Physics, Peking University
Arun Bansil: Northeastern University
Fangcheng Chou: Center for Condensed Matter Sciences, National Taiwan University
Hsin Lin: Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore
M. Zahid Hasan: Laboratory for Topological Quantum Matter and Spectroscopy (B7), Princeton University

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract 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.

Date: 2016
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms10556 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10556

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms10556

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().