Non-volatile resistive switching in the dielectric superconductor YBa2Cu3O7−ä

C. ACHA AND M. J. ROZENBERG

JOURNAL OF PHYSICS CONDENSED MATTER

IOP Publishing Ltd

Lugar: Bristol - UK; Año: 2009 vol. 21 p. 45702 - 45706

0953-8984

We report on the reversible, non-volatile and polarity-dependent resistive switching between superconductor and insulator states at the interfaces of an Au/YBa2Cu3O7  (YBCO)/Au system. We show that, upon application of electric pulses, the superconducting state of YBCOin regions near the electrodes can be reversibly removed and restored. In addition, four-wire measurements reveal that pulsing also induces significant non-volatile changes in the bulk resistance. We argue that our observations are compatible with a scenario where the switching effect is due to migration of oxygen ions along grain boundaries that control the inter-grain superconducting coupling.a2Cu3O7  (YBCO)/Au system. We show that, upon application of electric pulses, the superconducting state of YBCOin regions near the electrodes can be reversibly removed and restored. In addition, four-wire measurements reveal that pulsing also induces significant non-volatile changes in the bulk resistance. We argue that our observations are compatible with a scenario where the switching effect is due to migration of oxygen ions along grain boundaries that control the inter-grain superconducting coupling.