Non-equilibrium current and noise in inelastic tunneling through a magnetic atom
arXiv:1003.3794 · doi:10.1088/1367-2630/12/8/083028
Abstract
In a recent experiment, Hirjibehedin {\it et al.} [Science {\bf 317}, 1199 (2007)] performed inelastic tunneling spectroscopy of a single iron atom absorbed on a nonmagnetic substrate. The observed steps in the differential conductance marked the spin excitation energies. In this Letter, we explain observed nonmonotonicities in the differential conductance by a nonequilibrium population of the atom spin states. Furthermore, we predict super-Poissonian current noise due to this nonequilibrium situation. By introducing an anisotropic relaxation channel we are also able to explain the remarkable absence of nonequilibrium features at certain conductance steps.
published version, 11 pages, 3 figures
References in corpus (12)
- Electrical generation and absorption of phonons in carbon nanotubes
- Franck-Condon blockade in suspended carbon nanotube quantum dots
- Full Counting Statistics in Strongly Interacting Systems: Non-Markovian Effects
- Berry Phase Oscillations of the Kondo Effect in Single-Molecule Magnets
- Kondo-transport spectroscopy of single molecule magnets
- Nonequilibrium Transport through a Kondo Dot: Decoherence Effects
- Pumping of vibrational excitations in a Coulomb blockaded suspended carbon nanotube
- Spin Inelastic Electron Tunneling Spectroscopy on Local Spin Adsorbed on Surface
- Berry-phase blockade in single-molecule magnets
- Real-time renormalization group in frequency space: A 2-loop analysis of the nonequilibrium anisotropic Kondo model at finite magnetic field
- Non-equilibrium current and noise in inelastic tunneling through a magnetic atom
- Cotunneling current through quantum dots with phonon-assisted spin-flip processes