Quantized conductance in a contact between metallic oxide crystals
Citation:F. Ott, Barberan, J.G. Lunney, J.M.D. Coey, P. Berthet, A.M. de Leon-Guevara and A. Revcolevschii, 'Quantized conductance in a contact between metallic oxide crystals' in Physical Reviews 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.
Publisher:American Physical Society
Series/Report no:Physical Reviews B
Availability:Full text available