Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors

Heterostructures of magnetic topological insulators (MTIs) and superconductors (SCs) in two-dimensional (2D) slab and one-dimensional (1D) nanoribbon geometries have been predicted to host, respectively, chiral Majorana edge states (CMESs) and Majorana bound states (MBSs). We study the topological properties of such MTI/SC heterostructures upon variation of the geometry from wide slabs to quasi-1D nanoribbon systems and as a function of the chemical potential, the magnetic doping, and the induced superconducting pairing potential. To do so, we construct effective symmetry-constrained low-energy Hamiltonians accounting for the real-space confinement. For a nanoribbon geometry with finite width and length, we observe different phases characterized by CMESs, MBSs, as well as coexisting CMESs and MBSs, as the chemical potential, the magnetic doping, and/or the width are varied.

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Publication Details

Journal
Physical review. B./Physical review. B
Published
2024-08-22
DOI
https://doi.org/10.1103/physrevb.110.075426
Citations
4
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
1.35

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Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors

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4 citations
Physical review. B./Physical review. B
Topological Materials and Phenomena
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article

Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors

Eduárd Zsurka, Kristof Moors, Daniele Di Miceli, Llorenç Serra, Julian Legendre, Thomas L. Schmidt
article en
4 citations

Abstract

Heterostructures of magnetic topological insulators (MTIs) and superconductors (SCs) in two-dimensional (2D) slab and one-dimensional (1D) nanoribbon geometries have been predicted to host, respectively, chiral Majorana edge states (CMESs) and Majorana bound states (MBSs). We study the topological properties of such MTI/SC heterostructures upon variation of the geometry from wide slabs to quasi-1D nanoribbon systems and as a function of the chemical potential, the magnetic doping, and the induced superconducting pairing potential. To do so, we construct effective symmetry-constrained low-energy Hamiltonians accounting for the real-space confinement. For a nanoribbon geometry with finite width and length, we observe different phases characterized by CMESs, MBSs, as well as coexisting CMESs and MBSs, as the chemical potential, the magnetic doping, and/or the width are varied.

Physical review. B./Physical review. BVol. 110(7)
Forschungszentrum Jülich (DE), University of Luxembourg (LU), Institute for Cross-Disciplinary Physics and Complex Systems (ES), Jülich Aachen Research Alliance (DE), Universitat de les Illes Balears (ES), RWTH Aachen University (DE)
Deutsche Forschungsgemeinschaft, Fonds National de la Recherche Luxembourg, Bundesministerium für Bildung und Forschung, Ministerio de Ciencia e Innovación, Bayerische Staatsministerium für Wirtschaft, Landesentwicklung und Energie, Govern de les Illes Balears
Openalex Percentile: Top 20%
Topological Materials and Phenomena
1.35
DOIOpen Access PDFOpenAlex
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