Microwave-induced spin-flip scattering of electrons in point contacts

被引：8

作者：

Kadigrobov, A. M. ^{[1
,2
]}

Shekhter, R. I. ^{[1
]}

Aronov, I.

Kulinich, S. I. ^{[1
,3
]}

Pulkin, A. ^{[1
]}

Jonson, M. ^{[1
,4
,5
]}

机构：

[1] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden

[2] Ruhr Univ Bochum, D-44801 Bochum, Germany

[3] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

[4] Heriot Watt Univ, Dept Phys, Edinburgh EH14 4AS, Midlothian, Scotland

[5] Konkuk Univ, Sch Phys, Div Quantum Phases & Devices, Seoul 143701, South Korea

来源：

LOW TEMPERATURE PHYSICS | 2011年 / 37卷 / 11期

关键词：

contact resistance; ferromagnetic materials; point contacts; stimulated emission; GENERATION;

D O I：

10.1063/1.3671676

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In bilayer systems, electron-hole (e-h) pairs, we investigate resonant interaction of conduction electrons with an electromagnetic field that irradiates a point contact between a ferromagnetic and a normal metal in the presence of a strong magnetic field of order 1 T. We show that electron spin-flips caused by resonant absorption and stimulated emission of photons result in a sharp peak in the magnetic-field dependence of the point-contact resistance. The height of the peak is shown to be directly proportional to the net rate of energy transfer to the electromagnetic field in the point contact due to absorption and stimulated emission of photons. Estimations indicate that our theory can serve as a basis for the explanation of recent experiments [A.M. Kadigrobov , New J. Phys. 13, 023007 (2011)]. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3671676]

引用

页码：925 / 932

页数：8