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Conductivity of the interface between La0.7Ca(Sr)0.3MnO3 and underdoped YBa2Cu3O7−δ

✍ Scribed by P. Mikheenko; R.A. Chakalov; R. Chakalova; M.S. Colclough; C.M. Muirhead

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
311 KB
Volume
408-410
Category
Article
ISSN
0921-4534

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✦ Synopsis

We report resistance/temperature, conductance/voltage and voltage/magnetic field measurements in a range of junctions between collosal magnetoresistive materials and the high temperature superconductor YBa 2 Cu 3 O 7Àd . We identify two forms of behaviour. In one form the resistance of the junction falls monotonically with decreasing temperature and is associated with zero bias conductance peaks. In the other form the resistance rises below some characteristic temperature T Ã . In this latter case there is no zero bias conductance peak, but there are peaks in the voltage/ magnetic field behaviour below T Ã . We tentatively associate T Ã with the pseudogap temperature.

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