Majorana quasiparticles of inhomogeneous Rashba chain
| Autor: | Jakub Tworzydlo, Maciej M. Maśka, Anna Gorczyca-Goraj, Tadeusz Domański |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Diagonal
FOS: Physical sciences Zero-point energy 02 engineering and technology 01 natural sciences Superconductivity (cond-mat.supr-con) Chain (algebraic topology) Quantum mechanics Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Proximity effect (superconductivity) Invariant (mathematics) 010306 general physics Superconductivity Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect MAJORANA Quasiparticle 0210 nano-technology |
| Popis: | We investigate the inhomogeneous Rashba chain coupled to a superconducting substrate, hosting the Majorana quasiparticles near its edges. We discuss its subgap spectrum and study how robust are the zero-energy quasiparticles against the diagonal and off-diagonal disorder. Studying the $\mathbb{Z}_2$ topological invariant we show that disorder induced transition from the topologically non-trivial to trivial phases is manifested by characteristic features in the spatially-resolved quasiparticle spectrum at zero energy. We provide evidence for the non-local nature of the zero-energy Majorana quasiparticles, that are well preserved upon partitioning the chain into separate pieces. Even though the Majorana quasiparticles are not completely immune to inhomogeneity we show that they can spread onto other (normal) nanoscopic objects via the proximity effect. 15 pages, 22 figures |
| Databáze: | OpenAIRE |
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