Mesoscopic Stoner Instability
| dc.creator | Kurland, I. L. | |
| dc.creator | Aleiner, I. L. | |
| dc.creator | Altshuler, B. L. | |
| dc.date | 2000-04-12 | |
| dc.date.accessioned | 2026-07-07T02:37:20Z | |
| dc.date.available | 2026-07-07T02:37:20Z | |
| dc.description | The paper is devoted to the magnetic properties of isolated mesoscopic grains. We demonstrate that under very general conditions the electron - electron interactions in such grains can be taken into account by a simple interaction Hamiltonian. This Hamiltonian involves only three coupling constants which correspond to charging, exchange interaction, and superconducting correlations. The most important condition for such a description is that Thouless conductance of each grain is large. Under this condition sample-to-sample fluctuations of the coupling constants can be neglected. However, the thermodynamic properties can still remain sample-specific due to the one-electron part of the Hamiltonian. If the grain is made from a material which is close to the threshold of ferromagnetic instability the mesoscopic fluctuations of the magnetization are especially strong. Moreover, the situation becomes multi-stable: free energy of each grain as a function of the magnetization is characterized by a large number of local minima. We analyze the statistics of these minima and show that it possesses simple scaling properties. Numerical simulations confirm this scaling. | |
| dc.description | 19 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0004205 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0004205 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/16254 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Mesoscopic Stoner Instability | |
| dc.type | text |