Nonlocal damping of helimagnets in one-dimensional interacting electron systems

被引：7
|
作者：
Hals, Kjetil M. D. [1 ]
Flensberg, Karsten
Rudner, Mark S.
机构：
[1] Univ Copenhagen, Niels Bohr Int Acad, DK-2100 Copenhagen, Denmark
来源：
PHYSICAL REVIEW B | 2015年 / 92卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1103/PhysRevB.92.094403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the magnetization relaxation of a one-dimensional helimagnetic system coupled to interacting itinerant electrons. The relaxation is assumed to result from the emission of plasmons, the elementary excitations of the one-dimensional interacting electron system, caused by slow changes of the magnetization profile. This dissipation mechanism leads to a highly nonlocal form of magnetization damping that is strongly dependent on the electron-electron interaction. Forward-scattering processes lead to a spatially constant damping kernel, while backscattering processes produce a spatially oscillating contribution. Due to the nonlocal damping, the thermal fluctuations become spatially correlated over the entire system. We
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页数：6
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