A Spin Chern pump with fully gapped energy and spin spectra
A Spin Chern pump with fully gapped energy and spin spectra
复制标题
具有完全能隙和自旋谱的自旋陈泵浦
DOI:
10.1209/0295-5075/112/27008
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发表时间:
2015-10
期刊:
影响因子:
1.8
通讯作者:
D. Y. Xing
中科院分区:
文献类型:
--
作者:
M. N. Chen;W. Su;L. Sheng;D. Y. Xing
We propose a topological spin Chern pump using a two-dimensional topological insulator subject to electromagnetic radiations. In each cycle, spin can be continuously pumped into leads, which is attributed to the nonzero spin Chern numbers. In comparison to a previous model (Chen M. N. et al., Phys. Rev. B, 91 (2015) 125117), this system can have a much larger spin pumping conductivity. Moreover, the energy and spin spectra are always gapped in the present system, which makes the spin pumping more stable to perturbations. The spin pumping is an observable effect of the topological invariant spin Chern numbers, which may be useful in spintronic applications.
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影响因子:
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