Exploring topological phases in superconducting transition metal (Sc, Ti, V)-carbides

The combination of non trivial band topology and superconductivity, resulting in topological superconductivity, igniting a fervent pursuit in the realm of quantum materials. Through density functional theory and maximally localized Wannier functions, we delve into the electronic and topological prop...

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Published in:Materials science in semiconductor processing 2025-02, Vol.186, p.108993, Article 108993
Main Authors: Elbahri, A., Ragragui, M., Drissi, L.B., Saidi, E.H.
Format: Article
Language:English
Subjects:
Band inversion
Spin–orbit coupling
Surface states
Topological invariants
Topological superconductors
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Drissi, L.B.
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description The combination of non trivial band topology and superconductivity, resulting in topological superconductivity, igniting a fervent pursuit in the realm of quantum materials. Through density functional theory and maximally localized Wannier functions, we delve into the electronic and topological properties of transition metal carbides ΛC (with Λ= Sc, Ti, V). Phonon dispersions guarantee the structural stability of these superconductors. Witness the presence of band inversion within the Brillouin Zone of TiC and VC, contrasting the absence of such band inversion in ScC. In addition, the nonzero Z2 topological invariant as well as the occurrence of Dirac cone in the surface spectrum of TiC and VC, unveil their topologically nontrivial character. These transition metal carbides emerge as promising candidates for probing the depths of topological superconductivity and unraveling the associated Majorana bound states.
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subjects Band inversion
Spin–orbit coupling
Surface states
Topological invariants
Topological superconductors
title Exploring topological phases in superconducting transition metal (Sc, Ti, V)-carbides
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