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Point-contact spectroscopy of electron-phonon interaction in superconductors

The possibility to reconstruct the electron-phonon interaction (EPI) function was demonstrated for S-c-N and S-c-S point contacts using the superconducting inelastic contribution to the excess current caused by Andreev reflection processes. Superconductors with both weak (Sn, Al) and strong (Pb, In) EPI were considered. It was shown that in the latter case it is necessary to account for the elastic component of current which is related to the frequency dependence of the superconducting energy gap arising due to electron-phonon renormalization of the energy spectrum of the superconductor.

preprint2014arXivOpen access
N. L. BobrovA. V. KhotkevichG. V. KamarchukP. N. Chubov
cond-mat.supr-con
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Open access4 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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N. L. BobrovA. V. KhotkevichG. V. KamarchukP. N. Chubov

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