Observation of nodal line in non-symmorphic topological semimetal InBi

Ekahana SA, Wu SC, Jiang J, Okawa K, Prabhakaran D, Hwang CC, Mo SK, Sasagawa T, Felser C, Yan B, Liu Z, Chen Y (2017)

Publication Type: Journal article

Publication year: 2017

Journal

New Journal of Physics Institute of Physics: Open Access Journals / Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft

Book Volume: 19

Article Number: 065007

Journal Issue: 6

DOI: 10.1088/1367-2630/aa75a1

Abstract

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.

Involved external institutions

University of Oxford GB United Kingdom (GB) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) ShanghaiTech University / 上海科技大学 CN China (CN) Tokyo Institute of Technology JP Japan (JP) Pohang University of Science and Technology (POSTECH) KR Korea, Republic of (KR) Lawrence Berkeley National Laboratory (LBNL) US United States (USA) (US)

How to cite

APA:

Ekahana, S.A., Wu, S.-C., Jiang, J., Okawa, K., Prabhakaran, D., Hwang, C.-C.,... Chen, Y. (2017). Observation of nodal line in non-symmorphic topological semimetal InBi. New Journal of Physics, 19(6). https://doi.org/10.1088/1367-2630/aa75a1

MLA:

Ekahana, Sandy Adhitia, et al. "Observation of nodal line in non-symmorphic topological semimetal InBi." New Journal of Physics 19.6 (2017).

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