Tkachov, G. (2011) Nonmonotonic inelastic tunneling spectra due to surface spin excitations in ferromagnetic junctions. EUROPEAN PHYSICAL JOURNAL B, 82 (3-4). pp. 319-327. ISSN 1434-6028, 1434-6036
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The paper addresses inelastic spin-flip tunneling accompanied by surface spin excitations (magnons) in ferromagnetic junctions. The inelastic tunneling current is proportional to the magnon density of states which is energy-independent for the surface waves and, for this reason, cannot account for the bias-voltage dependence of the observed inelastic tunneling spectra. This paper shows that the bias-voltage dependence of the tunneling spectra can arise from the tunneling matrix elements of the electron-magnon interaction. These matrix elements are derived from the Coulomb exchange interaction using the itinerant-electron model of magnon-assisted tunneling. The results for the inelastic tunneling spectra, based on the nonequilibrium Green's function calculations, are presented for both parallel and antiparallel magnetizations in the ferromagnetic leads.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SUPERCONDUCTOR JUNCTIONS; LARGE MAGNETORESISTANCE; TEMPERATURE-DEPENDENCE; TRANSPORT-PROPERTIES; CONDUCTANCE; SCATTERING; ELECTRONS; INSULATOR; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Jun 2020 06:39 |
| Last Modified: | 03 Jun 2020 06:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20415 |
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