Accessing topological superconductivity via a combined STM and renormalization group analysis
Please always quote using this URN: urn:nbn:de:bvb:20-opus-148181
- The search for topological superconductors has recently become a key issue in condensed matter physics, because of their possible relevance to provide a platform for Majorana bound states, non-Abelian statistics, and quantum computing. Here we propose a new scheme which links as directly as possible the experimental search to a material-based microscopic theory for topological superconductivity. For this, the analysis of scanning tunnelling microscopy, which typically uses a phenomenological ansatz for the superconductor gap functions, isThe search for topological superconductors has recently become a key issue in condensed matter physics, because of their possible relevance to provide a platform for Majorana bound states, non-Abelian statistics, and quantum computing. Here we propose a new scheme which links as directly as possible the experimental search to a material-based microscopic theory for topological superconductivity. For this, the analysis of scanning tunnelling microscopy, which typically uses a phenomenological ansatz for the superconductor gap functions, is elevated to a theory, where a multi-orbital functional renormalization group analysis allows for an unbiased microscopic determination of the material-dependent pairing potentials. The combined approach is highlighted for paradigmatic hexagonal systems, such as doped graphene and water-intercalated sodium cobaltates, where lattice symmetry and electronic correlations yield a propensity for a chiral singlet topological superconductor. We demonstrate that our microscopic material-oriented procedure is necessary to uniquely resolve a topological superconductor state.…
Author: | Lars Elster, Christian Platt, Ronny Thomale, Werner Hanke, Ewelina M. Hankiewicz |
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URN: | urn:nbn:de:bvb:20-opus-148181 |
Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Language: | English |
Parent Title (English): | Nature Communications |
Year of Completion: | 2015 |
Volume: | 6 |
Issue: | 8232 |
Source: | Nature Communications 6:8232 (2015). DOI: 10.1038/ncomms9232 |
DOI: | https://doi.org/10.1038/ncomms9232 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 537 Elektrizität, Elektronik |
Tag: | Majorana fermions; Sr\(_2\)RuO\(_4\); insulators; states; surface; transition; tunneling spectroscopy; unconventional superconductivity; wave superconductors |
Release Date: | 2018/11/08 |
EU-Project number / Contract (GA) number: | 336012 |
OpenAIRE: | OpenAIRE |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |