Ferromagnetism's affect on the Aharonov-Bohm effect
Ferromagnetism's affect on the Aharonov-Bohm effect
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铁磁性对阿哈罗诺夫-玻姆效应的影响
DOI：
10.1103/physrevb.64.172408
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发表时间：
2001
影响因子：
3.7
通讯作者：
B. Barbara
中科院分区：
文献类型：
--
作者：
G. Tatara;B. Barbara
从理论上研究了铁磁环中的 Aharonov-Bohm (AB) 和 Altshuler-Aronov-Spivak (AAS) 振荡。铁磁性并不会从本质上影响 AB 效应，只是磁场变成了外部磁场和内部磁场的总和。由于强烈的 s−d 散射，大多数 3d 金属中的少数自旋通道会抑制 AAS 振荡，正如寿命的自旋依赖性很大所表明的那样。相比之下，由于 d 带中的态密度较小，预计大多数自旋通道将继续存在。
Aharonov-Bohm (AB) and Altshuler-Aronov-Spivak (AAS) oscillation in a ferromagnetic ring is studied theoretically. Ferromagnetism does not affect the AB effect in an essential way, except that the magnetic field becomes a sum of the external and internal field. AAS oscillation would be suppressed for a minority spin channel in most 3 d metals because of a strong s− d scattering, as indicated by a large spin dependence of a lifetime. The majority spin channel, in contrast, is expected to survive, due to a small density of states in the d band.