Thermalization of a parametrically driven magnon gas leading to Bose-Einstein condensation

被引：91
作者：
Demidov, V. E.
Dzyapko, O.
Demokritov, S. O. [1 ]
Melkov, G. A.
Slavin, A. N.
机构：
[1] Univ Munster, Inst Appl Phys, D-4400 Munster, Germany
[2] Univ Munster, Ctr Nonlinear Sci, D-4400 Munster, Germany
[3] Natl Taras Schevchenko Univ Kiev, Dept Radiophys, Kiev, Ukraine
[4] Oakland Univ, Dept Phys, Rochester, MI USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.99.037205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermalization of parametrically pumped magnons caused by nonlinear multimagnon scattering processes and leading to the magnon Bose-Einstein condensation is investigated experimentally with high temporal resolution. The threshold pumping power necessary for the thermalization is determined. For pumping powers above this threshold the thermalization time has been found to decrease rapidly with power reaching the value down to 50 ns, which is much smaller than the magnon lifetime.
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页数：4
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