Giant oscillations of the density of states and the conductance in a ferromagnetic conductor coupled to two superconductors
| dc.creator | Kadigrobov, A. | |
| dc.creator | Shekhter, R. I. | |
| dc.creator | Jonson, M. | |
| dc.date | 2005-03-28 | |
| dc.date.accessioned | 2026-07-07T03:04:19Z | |
| dc.date.available | 2026-07-07T03:04:19Z | |
| dc.description | Giant oscillations of the density of electronic states and the differential conductance of a superconductor-ferromagnet-superconductor structure are predicted for the case when the exchange energy, $I_0$, due to the interaction between the electron spin and the spontaneous moment of the ferromagnet is smaller than the superconductor energy gap, $Δ$. The effect is due to the extremely large degeneration of the energy level $ε= I_0$ when the superconductor phase difference $ϕ$ is close to odd multiple of $π$ ($ε$ is the electron energy measured from the Fermi-energy). This quantum interference effect persists even in long ferromagnetic bridges whose length much exceeds the ''magnetic length'' ($\hbar v_{F}/I_{0}$ in the ballistic regime and $\sqrt{\hbar D/I_0}$ in the diffusive regime; $D$ is the electron diffusion constant). The predicted effect allows a direct spectroscopy of Andreev levels in the ferromagnet as well as a direct measurement of the exchange energy,$I_0$. | |
| dc.description | 16 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0503643 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0503643 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26091 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Giant oscillations of the density of states and the conductance in a ferromagnetic conductor coupled to two superconductors | |
| dc.type | text |