Cooper Pair Shape in Normal-metal/Superconductor Junctions

Abstract

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 magneto-tunneling spectroscopy experiment which could confirm our predictions.

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Cited by in corpus (8)

• Topology of Andreev Bound States with Flat Dispersion
• On the Puzzle of Odd-Frequency Superconductivity
• Odd-frequency Superconductivity on a Quasi-one-dimensional Triangular Lattice in the Hubbard Model
• Possible Odd-Frequency Superconductivity in Strong-Coupling Electron-Phonon Systems
• Pairing symmetry of superconductivity coexisting with antiferromagnetism
• Pairing competition in a quasi-one-dimensional model of organic superconductors (TMTSF)${}_{2}X$ in magnetic field
• Quasiclassical circuit-theory of contiguous disordered multiband superconductors
• On the Meissner Effect of the Odd-Frequency Superconductivity with Critical Spin Fluctuations: Possibility of Zero Field FFLO pairing