Colossal paramagnetic moments in metallic carbon nanotori

被引:118
作者
Liu, L [1 ]
Guo, GY
Jayanthi, CS
Wu, SY
机构
[1] Univ Louisville, Dept Phys, Louisville, KY 40292 USA
[2] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
关键词
D O I
10.1103/PhysRevLett.88.217206
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Carbon nanostructures with unusually large paramagnetic moments have been discovered in a theoretical study of the electronic and magnetic properties of carbon nanotubes bent into toroids. Specifically, nanotori formed from metallic nanotubes with lambda(F)=3T , where lambda(F) is the Fermi wavelength and T the translation vector of the nanotube, exhibit giant paramagnetic moments at selected radii ("magic radii"), while the ones with lambda(F)=T are paramagnetic at any radius. The large paramagnetic moment is due to the interplay between the toroidal geometry and the ballistic motion of the pi electrons in the metallic nanotube.
引用
收藏
页码:2172061 / 2172064
页数:4
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