Spin Josephson effect in ferromagnet/ferromagnet tunnel junctions
| dc.creator | Nogueira, Flavio S. | |
| dc.creator | Bennemann, Karl-Heinz | |
| dc.date | 2003-02-26 | |
| dc.date | 2004-06-24 | |
| dc.date.accessioned | 2026-07-07T02:49:47Z | |
| dc.date.available | 2026-07-07T02:49:47Z | |
| dc.description | We consider the tunnel spin current between two ferromagnetic metals from a perspective similar to the one used in superconductor/superconductor tunnel junctions. We use fundamental arguments to derive a Josephson-like spin tunnel current $I_J^{\rm spin}\propto\sin(θ_1-θ_2)$. Here the phases are associated with the planar contribution to the magnetization, $<c_\uparrow^\dagger c_\downarrow>\sim e^{iθ}$. The crucial step in our analysis is the fact that the $z$-component of the spin is canonically conjugate to the phase of the planar contribution: $[θ,S^z]=i$. This is analogous to the commutation relation $[ϕ,N]=i$ in superconductors, where $ϕ$ is the phase associated to the superconducting order parameter and $N$ is the Cooper pair number operator. We briefly discuss the experimental consequences of our theoretical analysis. | |
| dc.description | LaTex, seven pages, no figures; version to appear in Europhys. Lett.; in order to make room for a more extended microscopic analysis, the phenomenological discussion contained in v2 was removed | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0302528 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0302528 | |
| dc.identifier | Europhys. Lett. 67, 620 (2004) | |
| dc.identifier | doi:10.1209/epl/i2003-10305-x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20939 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Spin Josephson effect in ferromagnet/ferromagnet tunnel junctions | |
| dc.type | text |