Photon generation in ferromagnetic point contacts
We show theoretically that a significant spin accumulation can occur in electric point contacts between two ferromagnetic electrodes with different magnetizations. Under appropriate conditions an inverse population of spin-split electronic levels results in stimulated emission of photons in the pr...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2012 |
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| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2012
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| Zitieren: | Photon generation in ferromagnetic point contacts / A.M. Kadigrobov, R.I. Shekhter, M. Jonson // Физика низких температур. — 2012. — Т. 38, № 12. — С. 1439–1445. — Бібліогр.: 25 назв. — англ. |
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Kadigrobov, A.M. Shekhter, R.I. Jonson, M. 2017-05-27T18:34:26Z 2017-05-27T18:34:26Z 2012 Photon generation in ferromagnetic point contacts / A.M. Kadigrobov, R.I. Shekhter, M. Jonson // Физика низких температур. — 2012. — Т. 38, № 12. — С. 1439–1445. — Бібліогр.: 25 назв. — англ. 0132-6414 PACS: 73.40.–c https://nasplib.isofts.kiev.ua/handle/123456789/117976 We show theoretically that a significant spin accumulation can occur in electric point contacts between two ferromagnetic electrodes with different magnetizations. Under appropriate conditions an inverse population of spin-split electronic levels results in stimulated emission of photons in the presence of a resonant electromagnetic field. The intensity of the emitted radiation can be several orders of magnitude higher than in typical semiconductor laser materials for two reasons. (1) The density of conduction electrons in a metal point conduct is much larger than in semiconductors. (2) The strength of the coupling between the electron spins and the electromagnetic field that is responsible for the radiative spin-flip transitions is set by the magnetic exchange energy and can therefore be very large as suggested by Kadigrobov et al. [Europhys. Lett. 67, 948 (2004)]. Financial support from the European Commission (FP7-ICT-FET-225955 STELE), the Swedish VR, and the Korean WCU program funded by MEST/NFR (R31-2008- 000-10057-0) is gratefully acknowledged. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Наноструктуры при низких температурах Photon generation in ferromagnetic point contacts Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Photon generation in ferromagnetic point contacts |
| spellingShingle |
Photon generation in ferromagnetic point contacts Kadigrobov, A.M. Shekhter, R.I. Jonson, M. Наноструктуры при низких температурах |
| title_short |
Photon generation in ferromagnetic point contacts |
| title_full |
Photon generation in ferromagnetic point contacts |
| title_fullStr |
Photon generation in ferromagnetic point contacts |
| title_full_unstemmed |
Photon generation in ferromagnetic point contacts |
| title_sort |
photon generation in ferromagnetic point contacts |
| author |
Kadigrobov, A.M. Shekhter, R.I. Jonson, M. |
| author_facet |
Kadigrobov, A.M. Shekhter, R.I. Jonson, M. |
| topic |
Наноструктуры при низких температурах |
| topic_facet |
Наноструктуры при низких температурах |
| publishDate |
2012 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
We show theoretically that a significant spin accumulation can occur in electric point contacts between two
ferromagnetic electrodes with different magnetizations. Under appropriate conditions an inverse population of
spin-split electronic levels results in stimulated emission of photons in the presence of a resonant electromagnetic
field. The intensity of the emitted radiation can be several orders of magnitude higher than in typical semiconductor
laser materials for two reasons. (1) The density of conduction electrons in a metal point conduct is much
larger than in semiconductors. (2) The strength of the coupling between the electron spins and the electromagnetic
field that is responsible for the radiative spin-flip transitions is set by the magnetic exchange energy and can
therefore be very large as suggested by Kadigrobov et al. [Europhys. Lett. 67, 948 (2004)].
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/117976 |
| fulltext |
|
| citation_txt |
Photon generation in ferromagnetic point contacts / A.M. Kadigrobov, R.I. Shekhter, M. Jonson // Физика низких температур. — 2012. — Т. 38, № 12. — С. 1439–1445. — Бібліогр.: 25 назв. — англ. |
| work_keys_str_mv |
AT kadigrobovam photongenerationinferromagneticpointcontacts AT shekhterri photongenerationinferromagneticpointcontacts AT jonsonm photongenerationinferromagneticpointcontacts |
| first_indexed |
2025-11-24T04:19:40Z |
| last_indexed |
2025-11-24T04:19:40Z |
| _version_ |
1850842069992472576 |