The band structure-matched and highly spin-polarized Co2CrZ/Cu2CrAl Heusler alloys interface
The band structure-matched and highly spin-polarized Co2CrZ/Cu2CrAl Heusler alloys interface
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能带结构匹配且高度自旋极化的 Co2CrZ/Cu2CrAl Heusler 合金界面
DOI：
10.1063/1.3263952
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发表时间：
2009
影响因子：
4
通讯作者：
Y. Feng
中科院分区：
文献类型：
--
作者：
V. Ko;G. Han;J. Qiu;Y. Feng
在这里，我们提出了一种晶格和能带匹配的Co2 CrZ Heusler合金间隔层，其中Z=Si或Al。通过第一性原理计算，我们发现，当它们与Cu 2CrAl界面时，能带结构匹配几乎完全满足。尽管由于界面态而损失了半金属性，我们的计算表明，在这些带匹配的（001）界面处的自旋极化率高于80%。这些晶格匹配的Co2 CrZ/Cu 2CrAl界面具有良好的能带匹配和增强的自旋散射不对称性，有望用于全金属电流垂直于平面的巨磁电阻器件的应用。
Here we present a lattice- and band-matched nonmagnetic L21 Heusler alloy spacer for Co2CrZ Heusler alloys where Z=Si or Al. By first principle calculations, we find that the band structure matching is almost perfectly satisfied when they are interfaced with Cu2CrAl. Despite the loss of half-metallicity due to interface states, our calculations show that the spin polarization at these band-matched (001) interfaces is higher than 80%. These lattice-matched Co2CrZ/Cu2CrAl interfaces with excellent band matching and enhanced spin scattering asymmetry are promising for all-metallic current-perpendicular-to-plane giant magnetoresistance device applications.