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The Superconductor- like Effects of the Chiral Toroidal Carbon Nanotubes in a Magnentic Field
Zhang Zhenhua1, Peng Jingcui2, Chen Xiaohua2, Wang Jianxiong2
1.Department of Applied Physics , Hunan University, Changsha 410082 Department ofImformation and Calculating Science, Changsha Communications College, Changsha 410076;2.Department of Applied Physics , Hunan University, Changsha 410082
Abstract:
The superconducting ring-like property and the chiral effects of persistent currents intoroidal carbon nanotubes (TCNTs) are studied in this paper by using the electronic state energy formula of chiral TCNTs derived from the energy dispersion relation of the graphene sheet. When T=0 K, the persistent current of metallic and semiconductortype TCNTs is a linealy periodical function ofΦ, with a periodΦ0, but it is very sensitive to chiral angleθand toroidal radiusR. The persistent currents in chiral TCNTs are much stronger than in the achiral TCNTs. It also have been discovered that persistent currents decrease when toroidal radiusRincrease or temperature rise,and the decreasing rate depends the chiral angleθof TCNTs
Key words:  Toroidal carbon nanotube  Superconductor-like effects  Chiral effects  Persistent Currents
FundProject:国家自然科学基金(批准号:59972031).
磁场中手性碳纳米环的类超导效应
张振华1, 彭景翠2, 陈小华2, 王健雄2
1.湖南大学应用物理系,长沙 410082 长沙交通学院信息与计算科学系,长沙 410076;2.湖南大学应用物理系,长沙 410082
摘要:
利用导出的任意手性碳纳米环(TCNTs)的电子状态-能量关系式,对磁场中任意手性TCNs所具有的类似超导环的性质及持续电流的手性效应进行理论探讨.在T=0K时,金属型和半导体型TCNTs象介观一维正常金属环一样具有类似超导环的性质、即持续电流以磁通量子φ0为周期随φ线性变化,且对手性角θ、环半径R极为敏感.手性TCNTs类似超导环的性质比高对称TCNTs明显得多,但随R增大而减弱,且减弱的快慢也与手性角θ有关.
关键词:  碳纳米环  超导效应  手性效应  持续电流
DOI:10.1088/1674-0068/14/3/345-349
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