Enhanced spin-triplet superconductivity near dislocations in Sr2RuO4
| Autor: | K. Sun, Tijiang Liu, Y. Xin, Zhiqiang Mao, Neal Staley, Y. A. Ying, Xinxin Cai, Yan Jun Liu, David Fobes |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Superconductivity Multidisciplinary Quantum decoherence Condensed matter physics General Physics and Astronomy 02 engineering and technology General Chemistry Symmetry reduction 021001 nanoscience & nanotechnology 01 natural sciences Topological quantum computer General Biochemistry Genetics and Molecular Biology MAJORANA Condensed Matter::Superconductivity Lattice (order) Pairing 0103 physical sciences Dislocation 010306 general physics 0210 nano-technology |
| Zdroj: | Nature Communications. 4 |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms3596 |
| Popis: | Superconductors with a chiral p-wave pairing are of great interest because they could support Majorana modes that could enable the development of topological quantum computing technologies that are robust against decoherence. Sr₂RuO₄ is widely believed to be a chiral p-wave superconductor. Yet, the mechanism by which superconductivity emerges in this, and indeed most other unconventional superconductors, remains unclear. Here we show that the local superconducting transition temperature in the vicinity of lattice dislocations in Sr₂RuO₄ can be up to twice that of its bulk. This is all the more surprising for the fact that disorder is known to easily quench superconductivity in this material. With the help of a phenomenological theory that takes into account the crystalline symmetry near a dislocation and the pairing symmetry of Sr₂RuO₄, we predict that a similar enhancement should emerge as a consequence of symmetry reduction in any superconductor with a two-component order parameter. |
| Databáze: | OpenAIRE |
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