Shape of Cooper pairs in a norma.-metal/superconductors junction

Yukio Tanaka, Yasuhiro Asano, Alexandre Avraamovitch Golubov

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In s-wave superconductors the Cooper pair wave function is isotropic in momentum space. This property may also be expected for Cooper pairs entering a normal metal from a superconductor due to the proximity effect. We show, however, that such a deduction is incorrect and the pairing function in a normal metal is surprisingly anisotropic because of quasiparticle interference. We calculate angle-resolved quasiparticle density of states in NS bilayers which reflects such anisotropic shape of the pairing function. We also propose a magnetotunneling spectroscopy experiment which could confirm our predictions
Original languageUndefined
Pages (from-to)220504-
JournalPhysical review B: Condensed matter and materials physics
Issue number22
Publication statusPublished - 2008


  • METIS-252477
  • IR-59248

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