Tunnel magnetoresistance of FM–organic molecule–FM junction: A Green's function approach

✍ Scribed by M. Ashhadi; S.A. Ketabi

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 586 KB
• Volume: 43
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2011.02.001

✦ Synopsis

Coherent spin-dependent electronic transport is investigated in a molecular junction made of organic molecule attached to two the semi-infinite ferromagnetic (FM) electrodes with finite cross sections. The conductance properties of the spin system are studied for a chain of benzene rings (oligophenylene). The work is based on a single band tight-binding model Hamiltonian and the Green's function approach with the Landauer-B üttiker formalism. It is shown that tunnel magnetoresistance (TMR) of molecular junction can be large (over 60%) by adjusting the related parameters, and depends on: (i) the applied voltages and (ii) the number of benzene rings.