Colossal paramagnetic moments in metallic carbon nanotori.
Colossal paramagnetic moments in metallic carbon nanotori.
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DOI：
10.1103/physrevlett.88.217206
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发表时间：
2002-03
影响因子：
8.6
通讯作者：
Lei Liu;Guang-Yu Guo;C. Jayanthi;Shi-Yu Wu
中科院分区：
文献类型：
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作者：
Lei Liu;Guang-Yu Guo;C. Jayanthi;Shi-Yu Wu
碳纳米管弯曲成环形时，在其电子和磁性的理论研究中发现了具有异常大的顺磁矩的碳纳米结构。具体地，由具有λ（F）= 3T的金属纳米管形成的纳米环面，其中λ（F）是费米波长，T是纳米管的平移矢量，在选定的半径（“魔半径”）处表现出巨大的顺磁性矩，而具有λ（F）= T的纳米环面在任何半径处都是顺磁性的。大的顺磁矩是由于金属纳米管中的环形几何形状和π电子的弹道运动之间的相互作用。
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.