Shiba Bound States across the mobility edge in doped InAs nanowires
| Autor: | Marco Aprili, Hervé Aubin, Alexandre Assouline, Cheryl Feuillet-Palma, Alexandre Zimmers, Jean-Christophe Harmand |
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| Přispěvatelé: | Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N) |
| Rok vydání: | 2017 |
| Předmět: |
Quantum phase transition
Nanowire General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 01 natural sciences Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons symbols.namesake Delocalized electron Condensed Matter::Superconductivity 0103 physical sciences Bound state Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Physics [PHYS]Physics [physics] Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Superconductivity Fermi level 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Quantum dot Excited state symbols Quasiparticle 0210 nano-technology |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2017, 119 (9), pp.097701. ⟨10.1103/PhysRevLett.119.097701⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.48550/arxiv.1709.05251 |
| Popis: | We present a study of Andreev Quantum Dots (QDots) fabricated with small-diameter (30 nm) Si-doped InAs nanowires where the Fermi level can be tuned across a mobility edge separating localized states from delocalized states. The transition to the insulating phase is identified by a drop in the amplitude and width of the excited levels and is found to have remarkable consequences on the spectrum of superconducting SubGap Resonances (SGRs). While at deeply localized levels, only quasiparticles co-tunneling is observed, for slightly delocalized levels, Shiba bound states form and a parity changing quantum phase transition is identified by a crossing of the bound states at zero energy. Finally, in the metallic regime, single Andreev resonances are observed. Comment: 9 pages, 4 figures in main text, 3 figures in supplementary |
| Databáze: | OpenAIRE |
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