Disconnected zigzag carbon nanotube as spin valve and spin filter predicted by first-principles study

作者：Min, Y.^*; Fang, J. H.; Dong, Z. C.; Zhong, C. G.; Chen, C. P.; Yao, K. L.

来源：Physica B: Condensed Matter , 2013, 430: 40-44.

DOI：10.1016/j.physb.2013.08.027

• First-principles
• Carbon nanotube
• Magnetic properties
• Defects
• Transport properties
• Nonequilibrium Green's-function

The first-principles study of the spin-polarized transport of a disconnected zigzag carbon nanotube is reported. We find that the tunnel magnetoresistance ratio continuously increases and has no trend or decrease. For magnetic parallel configuration, the spin-filter ratio also increases with bias and eventually reaches 99.37%. Our results indicate that the disconnected zigzag carbon nanotubes can be used as a perfect spin-filter or spin valve.

• 出版日期2013-12-1
• 单位华中科技大学; 南通大学