Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929526167044096 |
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| author | Legendre, Julian Zsurka, Eduárd Di Miceli, Daniele Serra, Llorenç Moors, Kristof Schmidt, Thomas L. |
| author_facet | Legendre, Julian Zsurka, Eduárd Di Miceli, Daniele Serra, Llorenç Moors, Kristof Schmidt, Thomas L. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_16520 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors Legendre, Julian Zsurka, Eduárd Di Miceli, Daniele Serra, Llorenç Moors, Kristof Schmidt, Thomas L. Mesoscale and Nanoscale Physics 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. |
| title | Topological properties of finite-size heterostructures of magnetic topological insulators and superconductors |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.16520 |