Tunneling through magnetic molecules with arbitrary angle between easy axis and magnetic field

Abstract

Inelastic tunneling through magnetically anisotropic molecules is studied theoretically in the presence of a strong magnetic field. Since the molecular orientation is not well controlled in tunneling experiments, we consider arbitrary angles between easy axis and field. This destroys all conservation laws except that of charge, leading to a rich fine structure in the differential conductance. Besides single molecules we also study monolayers of molecules with either aligned or random easy axes. We show that detailed information on the molecular transitions and orientations can be obtained from the differential conductance for varying magnetic field. For random easy axes, averaging over orientations leads to van Hove singularities in the differential conductance. Rate equations in the sequential-tunneling approximation are employed. An efficient approximation for their solution for complex molecules is presented. The results are applied to Mn12-based magnetic molecules.

10 pages, 10 figures included

References in corpus (8)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• Berry Phase Oscillations of the Kondo Effect in Single-Molecule Magnets
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Kondo-transport spectroscopy of single molecule magnets
• Theory for transport through a single magnetic molecule: Endohedral N@C60
• A possible classification of nonequilibrium steady states
• Cotunneling and non-equilibrium magnetization in magnetic molecular monolayers
• Dynamical symmetry breaking in transport through molecules

Cited by in corpus (4)

• Tunneling Spectra of Individual Magnetic Endofullerene Molecules
• Kondo effect in single-molecule magnet transistors
• Spin-bias driven magnetization reversal and nondestructive detection in a single molecular magnet
• Effects of Intrinsic Spin-Relaxation in Molecular Magnets on Current-Induced Magnetic Switching