Publications associated with X-ray and Neutron Scattering


Observation of nodal line in non-symmorphic topological semimetal InBi

New Journal of Physics IOP Publishing 19 (2017) 1-8

SA Ekahana, S-C Wu, J Jiang, D Prabhakaran, K Okawa, C-C Hwang, S-K Mo, T Sasagawa, C Felser, B Yan, Z Liu, Y Chen

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.


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