Volkov-Pankratov states in topological superconductors
| Autor: | Daniel E. Sheehy, Mark Oliver Goerbig, Pascal Simon, David J. Alspaugh |
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| Přispěvatelé: | Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11) |
| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Physics Condensed Matter - Mesoscale and Nanoscale Physics Magnetic domain Condensed Matter - Superconductivity FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Topology 01 natural sciences [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] Massless particle Superconductivity (cond-mat.supr-con) Coupling (physics) MAJORANA Condensed Matter::Superconductivity 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Quasiparticle 010306 general physics 0210 nano-technology |
| Zdroj: | Phys.Rev.Res. Phys.Rev.Res., 2020, 2 (2), pp.023146. ⟨10.1103/PhysRevResearch.2.023146⟩ |
| DOI: | 10.48550/arxiv.2002.05236 |
| Popis: | We study the in-gap states that appear at the boundaries of both 1D and 2D topological superconductors. While the massless Majorana quasiparticles are guaranteed to arise by the bulk-edge correspondence, we find that they could be accompanied by massive Volkov-Pankratov (VP) states which are present only when the interface is sufficiently smooth. These predictions can be tested in an s-wave superconductor with Rashba spin-orbit coupling placed on top of a magnetic domain wall. We calculate the spin-resolved local density of states of the VP states about the band inversion generated by a magnetic domain wall and find that they are oppositely spin-polarized on either side of the topological phase boundary. We also demonstrate that the spatial position, energy-level spacing, and spin polarization of the VP states can be modified by the introduction of in-plane electric fields. Comment: 10 pages, 8 figures |
| Databáze: | OpenAIRE |
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