Non-equilibrium current and noise in inelastic tunneling through a magnetic atom

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

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Cited by in corpus (19)

• Excitation of local magnetic moments by tunnelling electrons
• Spin dynamics of current driven single magnetic adatoms and molecules
• Transport through quantum-dot spin valves containing magnetic impurities
• Cotunneling theory of inelastic STM spin spectroscopy
• Transport mirages in single-molecule devices
• Quenching of magnetic excitations in single adsorbates at surfaces: Mn on CuN/Cu(100)
• Non-equilibrium current and noise in inelastic tunneling through a magnetic atom
• Spin-flip inelastic electron tunneling spectroscopy in atomic chains
• A pertubative approach to the Kondo effect in magnetic atoms on nonmagnetic substrates
• Electronic properties of transition metal atoms on Cu${}_2$N/Cu(100)
• Longitudinal and transverse spin relaxation times of magnetic single adatoms: an ab initio analysis
• Inverse counting statistics based on generalized factorial cumulants
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• Shot noise as a probe of spin-correlated transport through single atoms
• Bias asymmetry in the conductance profile of magnetic ions on surfaces probed by scanning tunneling microscopy
• Spin-fluctuation and spin-relaxation effects of single adatoms from first principles
• Engineering elliptical spin-excitations by complex anisotropy fields in Fe adatoms and dimers on Cu(111)
• Intrinsic spin-relaxation induced negative tunnel magnetoresistance in a single-molecule magnet
• Detection of the electrostatic spin crossover effect in magnetic molecules