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Optical absorption by quasiparticles in superconducting multilayers

✍ Scribed by H. Plehn; R. Kümmel

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
994 KB
Volume
508
Category
Article
ISSN
0003-3804

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✦ Synopsis

The absorption of photons by quasiparticles in the Bloch bands of multilayers, formed by alternating normal (N) and superconducting (S) regions. is computed for the vector of the oscillating electric field being perpendicular to the N-S interfaces. The absorption spectrum extends down to frequencies below the gap of the S-layers, and its structure results from the combined effects of Andreev scattering and conventional Scattering at the N-S interfaces. For not too different Fermi energies EFS and EFN in the S and N layers there is one prominent resonance peak. With increasing temperature low frequency absorption goes UP. For EFS >> EFN, on the other hand, a sharp multipeak structure at low frequencies is found.

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