首页 | 本学科首页   官方微博 | 高级检索  
     


Tunnel Magnetoresistance of the Heterocyclic Molecular Junctions: A Green’s Function Approach
Authors:A Ahmadi?Fouladi  S A Ketabi  S M Elahi  S A Sebt
Affiliation:1. Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
2. School of Physics, Damghan University, Damghan, Iran
Abstract:We explore the spin-dependent transport properties in a molecular junction model made of heterocyclic molecules such as poythiophene, polyfuran, and polypyrrole sandwiched between ferromagnetic three-dimensional electrodes, hereafter named FM/h-molecule/FM junction, based on a tight-binding model and a generalized Green??s function method in the Landauer?CBüttiker formalism. The coherent spin-dependent transport through the energy levels of heterocyclic molecules, the transmittance, current?Cvoltage (I?CV) characteristics, and the tunnel magnetoresistance (TMR) of the FM/h-molecule/FM junction are numerically investigated. It is found that the spin-dependent transport properties are importantly influenced by the heteroatoms in the heterocyclic molecules. It is shown that the TMR of the molecular junction can be quite large (over 69?%) depending on the applied voltage and the molecular field of the FM electrodes.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号