Open AccessObservation of nodal line in non-symmorphic topological semimetal InBi
Author(s) -
Sandy Adhitia Ekahana,
Shu-Chun Wu,
Juan Jiang,
Kenjiro Okawa,
D. Prabhakaran,
Choongyu Hwang,
M. Hashimoto,
T. Sasagawa,
Claudia Felser,
Binghai Yan,
Zhongkai Liu,
Yulin Chen
Publication year - 2017
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/aa75a1
Subject(s) - semimetal , physics , brillouin zone , condensed matter physics , surface states , dirac (video compression format) , degenerate energy levels , topology (electrical circuits) , photoemission spectroscopy , valence (chemistry) , band gap , quantum mechanics , surface (topology) , spectral line , geometry , mathematics , combinatorics , neutrino
Topological nodal semimetal (TNS), characterized 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 one-dimension 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 (which is also a type II Dirac semimetal) with strong spin-orbit coupling by using angle resolved photoemission spectroscopy. By tracking the crossing points of the bulk bands at the Brillouin zone boundary, we discovered the nodal-line feature along the kz direction, in agreement with the ab initio calculations and confirmed it to be a new compound in the TNLS family. Our discovery provides a new material platform for the study of these exotic topological quantum phases and paves the way for possible future applications