%0 Journal Article
%T Dephasing of Cooper pairs and subgap electron transport in superconducting hybrids
%A Andrew G. Semenov
%A Andrei D. Zaikin
%A Leonid S. Kuzmin
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevB.86.144529
%X 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 $L_\varphi$ remains finite and does not diverge at $T \to 0$. We evaluate the subgap conductance of NS hybrids in the presence of electron-electron interactions and demonstrate that this new length $L_\varphi$ can be directly extracted from conductance measurements in such structures.
%U http://arxiv.org/abs/1204.4038v2