### Abstract

We have calculated the temperature dependence of the conductance variation [δS(T)] of mesoscopic superconductor–normal-metal (S/N) structures, in the diffusive regime, analyzing both weak and strong proximity effects. We show that in the case of a weak proximity effect there are two peaks in the dependence of δS(T) on temperature. One of them (known from previous studies) corresponds to a temperature T1 of order of the Thouless energy (εTh), and another, newly predicted maximum, occurs at a temperature T2 where the energy gap in the superconductor Δ(T2) is of order εTh. In the limit Lφ<L the temperature T1 is determined by Dħ/L2φ(Lφ is the phase breaking length), and not εTh. We have also calculated the voltage dependence δS(V) for a S/F structure (F is a ferromagnet) and predict nonmonotonic behavior at voltages of order the Zeeman splitting.

Original language | English |
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Pages (from-to) | 6031-6034 |

Number of pages | 4 |

Journal | Physical Review B - Condensed Matter and Materials Physics |

Volume | 59 |

Issue number | 9 |

DOIs | |

Publication status | Published - 1 Mar 1999 |

Externally published | Yes |

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## Cite this

Seviour, R., Lambert, C. J., & Volkov, A. F. (1999). Anomalous transport in normal-superconducting and ferromagnetic-superconducting nanostructures.

*Physical Review B - Condensed Matter and Materials Physics*,*59*(9), 6031-6034. https://doi.org/10.1103/PhysRevB.59.6031