Experimental search for the origin of low-energy modes in topological materials
| Autor: | Krzysztof Dybko, E. Lusakowska, J. Z. Domagala, Jędrzej Korczak, Sławomir Kret, Andrzej Szczerbakow, Tomasz Dietl, Tomasz Story, G. P. Mazur, M. Zgirski, Aleksandr Kazakov, Maciej Sawicki |
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| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Materials science Condensed Matter - Superconductivity FOS: Physical sciences 02 engineering and technology Type (model theory) 021001 nanoscience & nanotechnology Topology 01 natural sciences Spectral line Andreev reflection Superconductivity (cond-mat.supr-con) Paramagnetism Ferromagnetism Condensed Matter::Superconductivity 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Anomaly (physics) 010306 general physics 0210 nano-technology Spectroscopy |
| Zdroj: | Physical Review B. 100 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Point-contact spectroscopy of several non-superconducting topological materials reveals a low temperature phase transition that is characterized by a Bardeen-Cooper-Schrieffer-type of criticality. We find such a behavior of differential conductance for topological surfaces of non-magnetic and magnetic Pb$_{1-y-x}$Sn$_y$Mn$_x$Te. We examine a possible contribution from superconducting nanoparticles, and show to what extent our data are consistent with Brzezicki's et al. theory [arXiv:1812.02168], assigning the observations to a collective state adjacent to atomic steps at topological surfaces. Comment: 15 pages, 27 figures (with Supplemental Material) |
| Databáze: | OpenAIRE |
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