Magnetic-field-driven single-electron pump
Magnetic-field-driven single-electron pump
复制标题
磁场驱动单电子泵
DOI：
10.1103/physrevb.64.235418
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发表时间：
2001
影响因子：
3.7
通讯作者：
Y. Ootuka
中科院分区：
文献类型：
--
作者：
H. Shimada;Y. Ootuka
一种铁磁三隧道结器件，其岛电极或引线电极由具有不同矫顽力的铁磁金属组成，通过施加交流磁场可以作为单电子泵操作。该装置利用磁场诱导的化学势的移动和磁化反转的铁磁电极作为其基本机制，除了单电子充电效应。我们描述了它的工作原理的正统理论的单电子隧穿，并进一步研究在磁化反转期间的畴壁传播在器件的操作和固有的限制的工作频率的作用。
A ferromagnetic triple-tunnel-junction device whose island electrodes or lead electrodes are composed of ferromagnetic metals with different coercive forces can be operated as a single-electron pump by applying an ac magnetic field. This device utilizes the magnetic-field-induced shift of chemical potential and magnetization reversal in the ferromagnetic electrode as its basic mechanisms in addition to the single-electron charging effect. We describe principle of its operation in terms of the orthodox theory of the single-electron tunneling, and further examine the role of the domain-wall propagation during the magnetization reversal in the operation of the device and intrinsic limitation of the operation frequency.