Inverse Magnetoresistance of Molecular Junctions

Abstract

We present calculations of spin-dependent electron transport through single organic molecules bridging pairs of iron nanocontacts. We predict the magnetoresistance of these systems to switch from positive to negative with increasing applied bias for both conducting and insulating molecules. This novel inverse magnetoresistance phenomenon is robust, does not depend on the presence of impurities, and is unique to molecular and atomic nanoscale magnetic junctions. Its physical origin is identified and its relevance to experiment and to potential technological applications is discussed.

5 pages, 3 figures; published version Phys. Rev. B

References in corpus (5)

• Microscopic origin of the conducting channels in metallic atomic-size contacts
• Spin-dependent transport in molecular tunnel junctions
• Electron Transport Through Molecules: Self-consistent and Non-self-consistent Approaches
• Molecular Spintronics: Spin-Dependent Electron Transport in Molecular Wires
• Theoretical Study of Spin-dependent Electron Transport in Atomic Fe Nanocontacts

Cited by in corpus (5)

• Tunnel Magnetoresistance of a Single-Molecule Junction
• Tight Binding Model of Mn12 Single Molecule Magnets: Electronic and Magnetic Structure and Transport Properties
• Voltage-controlled spin injection with an endohedral fullerene CoC${}_{60}$ dimer
• Electrical tuning of spin current in a boron nitride nanotube quantum dot
• Spin-polarized currents generated by magnetic Fe atomic chains