Interfacially controlled transient photoinduced superconductivity.
We report on a large transient photoinduced enhancement of the superconducting critical temperature (DeltaTc = 23 K) in epitaxial YBa2Cu3O(6.7)/La(0.7)Ca(0.3)MnO3 bilayers upon visible light illumination. The effect relaxes with a characteristic time of 100 s at low temperatures, which is 4 orders of magnitude faster than the persistent photoconductivity or persistent photoinduced superconductivity previously found in single high-Tc superconducting films. This result is discussed in terms of light induced charge transfer through the interface similar to what happens in semiconductor junctions.
Peña
V
V
Department of Physics, University of California-San Diego, La Jolla, California 92093-0319, USA.
Gredig
T
T
Santamaria
J
J
Schuller
Ivan K
IK