Quantised conductance in a contact between metallic oxide crystals
Citation:F Ott, S Barberan, J G Lunney, J M D Coey, P Berthet, A M de Leon-Guevara and A Revcolevschi 'Quantised conductance in a contact between metallic oxide crystals' in Physical Review B, 58, (8), 1998, pp 4656-4659
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The conductance of a point contact between two crystals of metallic (La0.75Sr0.25)MnO3 shows steps as the contact is broken. A histogram of the conductance values observed in 60 breaks exhibits a series of sharp peaks at integer multiples of G0 = 2e2/h. Quantum conductance in these ceramics is qualitatively different from that normally seen in metals and suggests that no neck formation occurs during fracture of a contact between these brittle materials.
Author: COEY, JOHN MICHAEL DAVID
Publisher:American Physical Society
Series/Report no:Physical Review B
Availability:Full text available