Session B33: Superconductivity: Mostly Cuprates
11:15 AM–2:15 PM, Monday, March 16, 2009
Room: 403
Sponsoring Unit:
DCMP
Chair: Timir Datta, University of South Carolina
Abstract ID: BAPS.2009.MAR.B33.3
Abstract: B33.00003 : Resistive switching in YBa$_2$Cu$_3$O$_{7-\delta}$
11:39 AM–11:51 AM
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Abstract 
Authors:
Carlos Acha
(Departamento de Fisica - FCEyN - Universidad de Buenos Aires)
Marcelo J. Rozenberg
(Departamento de Fisica - FCEyN - Universidad de Buenos Aires)
We report on the nonvolatile and polarity dependent resistance switching of metal- YBa$_2$Cu$_3$O$_{7-\delta}$ (YBCO) ceramic superconductor interfaces that also extends macroscopically to the bulk YBCO. We show that electric pulses mainly modify the connectivity of the ceramic grains of the bulk material, affecting the geometrical conducting factor near the interface and controlling the superconducting percolating path in the bulk. Relaxation processes of the resistivity after applying the pulses, not associated with heating effects, are also observed. We also report on the temperature sensitivity of resistance hysteresis switching loops, where both the difference between high and low resistance states and the voltage needed to produce the switching decrease with increasing temperature. The origin of this switching effect may be related to electric field-induced oxygen ion migration, which modifies the oxygen content at grain boundaries and controls the electric transport of ceramic superconductors.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.B33.3