Large-scale modulation in the superconducting properties of thin films due to domains in the SrTi O3 substrate

Shai Wissberg, Beena Kalisky

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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 languageEnglish
Article number144510
JournalPhysical Review B
Volume95
Issue number14
DOIs
StatePublished - 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.

FundersFunder number
Horizon 2020 Framework Programme333799, 639792
Marie CurieFP7-PEOPLE-2012-CIG-333799
European Research Council
Israel Science FoundationISF-1102/13

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