High-Temperature-Superconducting Weak Link Defined by the Ferroelectric Field Effect

被引：8

作者：

Begon-Lours, L. ^{[1
]}

Rouco, V. ^{[1
]}

Sander, A. ^{[1
]}

Trastoy, J. ^{[1
]}

Bernard, R. ^{[1
,2
]}

Jacquet, E. ^{[1
]}

Bouzehouane, K. ^{[1
]}

Fusil, S. ^{[1
]}

Garcia, V. ^{[1
]}

Barthelemy, A. ^{[1
]}

Bibes, M. ^{[1
]}

Santamaria, J. ^{[1
,3
]}

Villegas, J. E. ^{[1
]}

机构：

[1] Univ Paris Saclay, Univ Paris Sud, CNRS, Unite Mixte Phys,Thales, F-91767 Palaiseau, France

[2] CNRS, INSA Rennes, Fonct Opt Technol Informat, UMR 6082, Rennes, France

[3] Univ Complutense Madrid, Fac CC Fis, Dept Fis Mat, GFMC, Madrid, Spain

来源：

PHYSICAL REVIEW APPLIED | 2017年 / 7卷 / 06期

基金：

欧洲研究理事会;

关键词：

VORTEX-GLASS SUPERCONDUCTIVITY; JUNCTIONS; PHASE;

D O I：

10.1103/PhysRevApplied.7.064015

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In all-oxide ferroelectric (FE) superconductors (S), due to the low carrier concentration of oxides compared to transition metals, the FE interfacial polarization charges induce an accumulation (or depletion) of charge carriers in the S. This effect leads either to an enhancement or a depression of its critical temperature, depending on the FE polarization direction. Here, we exploit this effect at a local scale to define planar weak links in high-temperature-superconducting wires. These experiments are realized in BiFeO3 (FE)/YBa2Cu3O7-x (S) bilayers in which the remnant FE domain structure is "written" by locally applying voltage pulses with a conductive-tip atomic force microscope. In this fashion, the FE domain pattern defines a spatial modulation of superconductivity. This characteristic allows us to "write" a device whose electrical transport shows different temperature regimes and magnetic-field-matching effects that are characteristic of Josephson coupled weak links. This behavior illustrates the potential of the ferroelectric approach for the realization of high-temperature-superconducting devices.

引用

页数：6

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