Abstract
Scanning superconducting quantum interference device measurements reveal large-scale modulations of the superfluid density and the critical temperature in superconducting Nb, NbN, and underdoped YBa2Cu3O7-δ films deposited on SrTiO3 (STO). We show that these modulations are a result of the STO domains and domain walls, forming below the 105 K structural phase transition of STO. We found that the flow of normal current, measured above the superconducting transition, is also modulated over the same domain structure, suggesting a modified carrier density. In clean STO, domain walls remain mobile down to low temperatures. Modulated superconductivity over mobile channels offers the opportunity to locally control superconducting properties and better understand the relations between superconductivity and the local structure.
Original language | English |
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Article number | 144510 |
Journal | Physical Review B |
Volume | 95 |
Issue number | 14 |
DOIs | |
State | Published - 20 Apr 2017 |
Bibliographical note
Publisher Copyright:© 2017 American Physical Society.
Funding
S.W. and B.K. were supported by the European Research Council Grant No. ERC-2014-STG-639792, Marie Curie Career Integration Grant No. FP7-PEOPLE-2012-CIG-333799, and Israel Science Foundation Grant No. ISF-1102/13.
Funders | Funder number |
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Horizon 2020 Framework Programme | 333799, 639792 |
Marie Curie | FP7-PEOPLE-2012-CIG-333799 |
European Commission | |
Israel Science Foundation | ISF-1102/13 |