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Dephasing of Cooper pairs and subgap electron transport in superconducting hybrids

A. G. Semenov ; A. D. Zaikin ; Leonid Kuzmin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Physical Review B (1098-0121). Vol. 86 (2012), 14,
[Artikel, refereegranskad vetenskaplig]

We argue that electron-electron interactions fundamentally restrict the penetration length of Cooper pairs into a diffusive normal metal (N) from a superconductor (S). At low temperatures, this Cooper pair dephasing length L-phi remains finite and does not diverge at T -> 0. We evaluate the subgap conductance of NS hybrids in the presence of electron-electron interactions and demonstrate that this length L-phi can be directly extracted from conductance measurements in such structures.

Nyckelord: quantum decoherence, weak-localization, conductivity, junctions

Denna post skapades 2012-11-29.
CPL Pubid: 166849


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik



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