Fabrication of High-Temperature Quasi-Two-Dimensional Superconductors at the Interface of a Ferroelectric Ba0.8Sr0.2TiO3 Film and an Insulating Parent Compound of La2CuO4

Dmitrii P. Pavlov, Rustem R. Zagidullin, Vladimir M. Mukhortov, Viktor V. Kabanov, Tadashi Adachi, Takayuki Kawamata, Yoji Koike, Rinat F. Mamin

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10 Citations (Scopus)

Abstract

We report the first observation of superconductivity in a heterostructure consisting of an insulating ferroelectric film (Ba0.8Sr0.2TiO3) grown on an insulating parent compound of La2CuO4 with [001] orientation. The heterostructure was prepared by magnetron sputtering on a nonatomically flat surface with inhomogeneities of the order of 1-2 nm. The measured superconducting transition temperature Tc is about 30 K. We have shown that superconductivity is confined near the interface region. Application of a weak magnetic field perpendicular to the interface leads to the appearance of the finite resistance. That confirms the quasi-two-dimensional nature of the superconductive state. The proposed concept promises ferroelectrically controlled interface superconductivity which offers the possibility of novel design of electronic devices.

Original languageEnglish
Article number237001
JournalPhysical review letters
Volume122
Issue number23
DOIs
Publication statusPublished - 2019 Jun 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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