Shape of Cooper pairs in a normal-metal/superconductor junction

Tanaka, Yukio and Asano, Yasuhiro and Golubov, Alexander A. (2008) Shape of Cooper pairs in a normal-metal/superconductor junction. Physical Review B: Condensed matter and materials physics, 77 (22). p. 220504. ISSN 1098-0121

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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 magnetotunneling spectroscopy experiment which could confirm our predictions
Item Type:	Article
Copyright:	© 2008 American Physical Society
Faculty:	Science and Technology (TNW)
Research Group:	Low Temperatures - Biomagnetism (LT)
Link to this item:	http://purl.utwente.nl/publications/59248
Official URL:	http://dx.doi.org/10.1103/PhysRevB.77.220504
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