Period Halving of Persistent Currents in mesoscopic Mobius Ladders

作     者：邓文基 刘平 等 

作者机构：DepartmentofPhysicsSouthChinaUniversityofTechnologyGuangzhou510641 ResearchInstituteofMaterialsScienceSouthChinaUniversityofTechnologyGuangzhou510641 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2002年第19卷第7期

页      面：988-991页

核心收录：

学科分类：080705[工学-制冷及低温工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0702[理学-物理学] 

基　　金：国家973计划 广东省自然科学基金 

主　　题：Ladders 

摘      要：We investigate the period halving of persistent currents (PCs) of non-interacting electrons in isolated mesoscopic Möbius ladders without disorder, pierced by Aharonov-Bohm flux. The mechanisms of the period halving effect depend on the parity of the number of electrons as well as on the interchain hopping. Although the data of PCs in mesoscopic systems are sample specific, some simple rules are found in the canonical ensemble average, for example, all the odd harmonics of the PCs disappear and the signals of even harmonics are non-negative.