Observation of nodal line in non-symmorphic topological semimetal InBi

DOI: 10.1088/1367-2630/aa75a1

Authors: Sandy Adhitia Ekahana (University of Oxford) , Shu-chun Wu (Max-Planck-Institut für Chemische Physik) , Juan Jiang (Fudan University) , Kenjiro Okawa (Tokyo Kogyo Daigaku) , Dharmalingam Prabhakaran (University of Oxford) , Chan-cuk Hwang (Pohang University of Science and Technology) , Sung-kwan Mo (Lawrence Berkeley National Laboratory) , Takao Sasagawa (Tokyo Institute of Technology) , Claudia Felser (Max Planck Institute for Chemical Physics of Solids) , Binghai Yan (Max-Planck-Institut fur Chemische Physik fester Stoffe) , Zhongkai Liu (Diamond Light Source) , Yulin Chen (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: New Journal Of Physics

State: Published (Approved)
Published: June 2017

Abstract: Topological Nodal Semimetal (TNS), characterised by its touching conduction and valence bands, is a newly discovered state of quantum matter which exhibits various exotic physical phenomena. Recently, a new type of TNS called Topological Nodal Line Semimetal (TNLS) is predicted where its conduction and valence band form a degenerate 1D line which is further protected by its crystal symmetry. In this work, we systematically investigated the bulk and surface electronic structure of the non-symmorphic, TNLS in InBi with strong spin-orbit coupling by using Angle Resolved Photoemission Spectroscopy (ARPES). By tracking the crossing points of the bulk bands at the Brillouin zone boundary, we discovered the nodal-line feature along the XRX line, in agreement with the ab-initio calculations and confirmed it to be a new compound in the TNLS family. Our discovery provides new material platform for the study of these exotic topological quantum phases and paves the way for possible future applications.

Subject Areas: Physics


Instruments: I05-ARPES

Added On: 26/06/2017 09:43

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