Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field
The symmetry of Cooper pairs is central to constructing a superconducting state. The demonstration of a d(x2-y2)-wave order parameter with nodes represented a breakthrough for high critical temperature superconductors (HTSs)(1,2). However, despite this fundamental discovery, the origin of supercondu...
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ftchalmersuniv:oai:research.chalmers.se:172652 2023-05-15T16:00:31+02:00 Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field Gustafsson, David Golubev, D. Fogelström, Mikael Claeson, Tord Kubatkin, Sergey Bauch, Thilo Lombardi, Floriana 2013 text https://doi.org/10.1038/nnano.2012.214 https://research.chalmers.se/en/publication/172652 unknown http://dx.doi.org/10.1038/nnano.2012.214 https://research.chalmers.se/en/publication/172652 Condensed Matter Physics breaking pairing symmetry cuprate superconductors thermal-conductivity t-c superconductors transistor phase-coherence temperature junctions time-reversal 2013 ftchalmersuniv https://doi.org/10.1038/nnano.2012.214 2022-12-11T07:06:33Z The symmetry of Cooper pairs is central to constructing a superconducting state. The demonstration of a d(x2-y2)-wave order parameter with nodes represented a breakthrough for high critical temperature superconductors (HTSs)(1,2). However, despite this fundamental discovery, the origin of superconductivity remains elusive, raising the question of whether something is missing from the global picture. Deviations from d(x2-y2)-wave symmetry(3,4), such as an imaginary admixture d(x2-y2) + is (or id(xy)), predict a ground state with unconventional properties exhibiting a full superconducting gap and time reversal symmetry breaking(5). The existence of such a state, until now highly controversial(6-10), can be proved by highly sensitive measurements of the excitation spectrum. Here, we present a spectroscopic technique based on an HTS nanoscale device that allows an unprecedented energy resolution thanks to Coulomb blockade effects, a regime practically inaccessible in these materials previously. We find that the energy required to add an extra electron depends on the parity (odd/even) of the excess electrons on the island and increases with magnetic field. This is inconsistent with a pure d(x2-y2)-wave symmetry and demonstrates a complex order parameter component that needs to be incorporated into any theoretical model of HTS. Other/Unknown Material Delta Island Chalmers University of Technology: Chalmers research Nature Nanotechnology 8 1 25 30 |
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Chalmers University of Technology: Chalmers research |
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ftchalmersuniv |
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unknown |
topic |
Condensed Matter Physics breaking pairing symmetry cuprate superconductors thermal-conductivity t-c superconductors transistor phase-coherence temperature junctions time-reversal |
spellingShingle |
Condensed Matter Physics breaking pairing symmetry cuprate superconductors thermal-conductivity t-c superconductors transistor phase-coherence temperature junctions time-reversal Gustafsson, David Golubev, D. Fogelström, Mikael Claeson, Tord Kubatkin, Sergey Bauch, Thilo Lombardi, Floriana Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
topic_facet |
Condensed Matter Physics breaking pairing symmetry cuprate superconductors thermal-conductivity t-c superconductors transistor phase-coherence temperature junctions time-reversal |
description |
The symmetry of Cooper pairs is central to constructing a superconducting state. The demonstration of a d(x2-y2)-wave order parameter with nodes represented a breakthrough for high critical temperature superconductors (HTSs)(1,2). However, despite this fundamental discovery, the origin of superconductivity remains elusive, raising the question of whether something is missing from the global picture. Deviations from d(x2-y2)-wave symmetry(3,4), such as an imaginary admixture d(x2-y2) + is (or id(xy)), predict a ground state with unconventional properties exhibiting a full superconducting gap and time reversal symmetry breaking(5). The existence of such a state, until now highly controversial(6-10), can be proved by highly sensitive measurements of the excitation spectrum. Here, we present a spectroscopic technique based on an HTS nanoscale device that allows an unprecedented energy resolution thanks to Coulomb blockade effects, a regime practically inaccessible in these materials previously. We find that the energy required to add an extra electron depends on the parity (odd/even) of the excess electrons on the island and increases with magnetic field. This is inconsistent with a pure d(x2-y2)-wave symmetry and demonstrates a complex order parameter component that needs to be incorporated into any theoretical model of HTS. |
author |
Gustafsson, David Golubev, D. Fogelström, Mikael Claeson, Tord Kubatkin, Sergey Bauch, Thilo Lombardi, Floriana |
author_facet |
Gustafsson, David Golubev, D. Fogelström, Mikael Claeson, Tord Kubatkin, Sergey Bauch, Thilo Lombardi, Floriana |
author_sort |
Gustafsson, David |
title |
Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
title_short |
Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
title_full |
Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
title_fullStr |
Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
title_full_unstemmed |
Fully gapped superconductivity in a nanometresize YBa2Cu3O7-delta island enhanced by a magnetic field |
title_sort |
fully gapped superconductivity in a nanometresize yba2cu3o7-delta island enhanced by a magnetic field |
publishDate |
2013 |
url |
https://doi.org/10.1038/nnano.2012.214 https://research.chalmers.se/en/publication/172652 |
genre |
Delta Island |
genre_facet |
Delta Island |
op_relation |
http://dx.doi.org/10.1038/nnano.2012.214 https://research.chalmers.se/en/publication/172652 |
op_doi |
https://doi.org/10.1038/nnano.2012.214 |
container_title |
Nature Nanotechnology |
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8 |
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1 |
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25 |
op_container_end_page |
30 |
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1766396501907472384 |