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 (22)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• Phonon effects in molecular transistors: Quantum and classical treatment
• Electron transport through single Mn12 molecular magnets
• Mesoscopic quantum transport: Resonant tunneling in the presence of strong Coulomb interaction
• Signatures of Molecular Magnetism in Single-Molecule Transport Spectroscopy
• Thermopower of Single-Molecule Devices
• Spin amplification, reading, and writing in transport through anisotropic magnetic molecules
• Quantum tunneling induced Kondo effect in single molecular magnets
• Cotunneling thermopower of single electron transistors
• Transport through anisotropic magnetic molecules with partially ferromagnetic leads: Spin-charge conversion and negative differential conductance
• Berry Phase Oscillations of the Kondo Effect in Single-Molecule Magnets
• Transport through a double quantum dot in the sequential- and co- tunneling regimes
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Spin quantum tunneling in single molecular magnets: fingerprints in transport spectroscopy of current and noise
• Magnetic Switching of a Single Molecular Magnet due to Spin-Polarized Current
• 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
• Resonant Tunneling and Coulomb Oscillations
• Effect of extra electrons on the exchange and magnetic anisotropy in the anionic single-molecule magnet Mn12

Cited by in corpus (16)

• Tunneling Spectra of Individual Magnetic Endofullerene Molecules
• Charge transport through single molecules, quantum dots, and quantum wires
• Spin effects in transport through single-molecule magnets in the sequential and cotunneling regimes
• Kondo effect in single-molecule magnet transistors
• Spin-bias driven magnetization reversal and nondestructive detection in a single molecular magnet
• Random transition-rate matrices for the master equation
• Effects of Intrinsic Spin-Relaxation in Molecular Magnets on Current-Induced Magnetic Switching
• Theory of Tunneling Spectroscopy in a Mn${}_{12}$ Single-Electron Transistor by Density-Functional Theory Methods
• Tight Binding Model of Mn12 Single Molecule Magnets: Electronic and Magnetic Structure and Transport Properties
• Ligand-based transport resonances of single-molecule magnet spin filters: Suppression of the Coulomb blockade and determination of the orientation of the magnetic easy axis
• Effect of finite Coulomb interaction on full counting statistics of electronic transport through single-molecule magnet
• Josephson effect through an anisotropic magnetic molecule
• Spin transport and tunable Gilbert damping in a single-molecule magnet junction
• Tunneling anisotropic magnetoresistance in single-molecule magnet junctions
• Cotunneling signatures of Spin-Electric coupling in frustrated triangular molecular magnets
• Negative differential conductance and super-Poissonian shot noise in single-molecule magnet junctions