Electron-phonon interactions in superconducting La1.84Sr0.16CuO4 films

We have measured quasiparticle tunneling across a junction perpendicular to the superconducting copper oxide planes. The tunneling spectra show peaks in the density of states. There are 11 minima in the second derivative d2I/dV2, where I is the current and V the voltage, suggesting multiple boson-qu...

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Bibliographic Details
Published in:Physical review letters 2008-12, Vol.101 (24), p.247004-247004
Main Authors: Shim, Heejae, Chaudhari, P, Logvenov, Gennady, Bozovic, Ivan
Format: Article
Language:English
Online Access:Get full text
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Summary:We have measured quasiparticle tunneling across a junction perpendicular to the superconducting copper oxide planes. The tunneling spectra show peaks in the density of states. There are 11 minima in the second derivative d2I/dV2, where I is the current and V the voltage, suggesting multiple boson-quasiparticle interactions. These minima match precisely with the published Raman scattering data, leading us to conclude that the relevant bosons in superconducting La1.84Sr0.16CuO4 films are phonons.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.101.247004