Topological hybrid semimetal phases and anomalous Hall effects in a three dimensional magnetic topological insulator

In this work, we propose a ferromagnetic Bi 2 Se 3 as a candidate to hold the coexistence of Weyl- and nodal-line semimetal phases, which breaks the time reversal symmetry. We demonstrate that the type-I Weyl semimetal phase, type-I-, type-II- and their hybrid nodal-line semimetal phases can arise b...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2022-01, Vol.34 (2), p.25502
Main Authors: Chen, M N, Chen, W C, Zhou, Yu
Format: Article
Language:English
Subjects:
Berry curvature
topological insulator
topological semimetal
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Summary:In this work, we propose a ferromagnetic Bi 2 Se 3 as a candidate to hold the coexistence of Weyl- and nodal-line semimetal phases, which breaks the time reversal symmetry. We demonstrate that the type-I Weyl semimetal phase, type-I-, type-II- and their hybrid nodal-line semimetal phases can arise by tuning the Zeeman exchange field strength and the Fermi velocity. Their topological responses under U(1) gauge field are also discussed. Our results raise a new way for realizing Weyl and nodal-line semimetals and will be helpful in understanding the topological transport phenomena in three-dimensional material systems.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ac2ed7