Persistent Currents and Edge States in a Quasi-One-Dimensional Mesoscopic Ring with a Screened Interaction  

作　　者：HE Guang-Ping LI Hua-Zhong 

机构地区：[1]Advanced Research Center, Zhongshan University, Guangzhou 510275, China Advanced Research Center, Zhongshan University, Guangzhou 510275, China

出　　处：《Communications in Theoretical Physics》2002年第11期621-628,共8页理论物理通讯（英文版）

基　　金：The project partially supported by Natural Science Foundation of Guangdong Province under Grant No. 01115 and the Foundation ofZhongshan University Advanced Research Centre under Grant No. 02P2

摘　　要：The effect ofthe edge state on the persistent current in quasi-1D mesoscopic rings with a screened interactionwhich exists only between nearest-neighboring particles is studied with the Hartree-Fock approximation. The theoreticalvalue of the current magnitude is greatly enhanced by both the edge state and the Coulomb interaction, and pinningthe electrons into a lattice is good for the enhancement if screening happens. In high dimensional systems the screeningeffect can make the interacting range show anisotropy, and create a tendency of gathering for particles with a repulsivepotential.

关 键 词：STRONGLY CORRELATED electron systems  PERSISTENT currents  edge STATES 

分 类 号：O4[理学—物理]