American Physical Society, Physical Review B (Condensed Matter), 8(58), p. 4656-4659, 1998
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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. ; PUBLISHED ; This work was supported by the European Commission as part of the Oxide Spin Electronics Network ~OXSEN!.