Perturbative approach to the Kondo effect in magnetic atoms on nonmagnetic substrates
Citation:
Aaron Hurley, Nadjib Baadji, and Stefano Sanvito, Perturbative approach to the Kondo effect in magnetic atoms on nonmagnetic substrates, Physical Review B, 84, 11, 2011, 115435-Download Item:
PhysRevB.84.115435.pdf (Published (publisher's copy)) 401.2Kb
Abstract:
Recent experimental advances in scanning tunneling microscopy make the measurement of the conductance
spectra of isolated and magnetically coupled atoms on nonmagnetic substrates possible. Notably, these spectra are
characterized by a competition between the Kondo effect and spin-flip inelastic electron tunneling. In particular
they include Kondo resonances and a logarithmic enhancement of the conductance at voltages corresponding to
magneticexcitations,twofeaturesthatcannotbecapturedbysecond-orderperturbationtheoryintheelectron-spin
coupling. We have now derived a third-order analytic expression for the electron-spin self-energy, which can be
readily used in combination with the nonequilibrium Green?s function scheme for electron transport at finite bias.
We demonstrate that our method is capable of semiquantitative description of the competition between Kondo
resonances and spin-flip inelastic electron tunneling at a computational cost significantly lower than that of other
approaches. The examples of Co and Fe on CuN are discussed in detail
Sponsor
Grant Number
Irish Research Council for Science and Engineering Technology (IRCSET)
G30321
Science Foundation Ireland (SFI)
08/ERA/I1759
Author's Homepage:
http://people.tcd.ie/sanvitosDescription:
PUBLISHED
Author: SANVITO, STEFANO
Sponsor:
Irish Research Council for Science and Engineering Technology (IRCSET)Science Foundation Ireland (SFI)
Type of material:
Journal ArticleCollections:
Series/Report no:
Physical Review B84
11
Availability:
Full text availableSubject:
Kondo effectSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.84.115435The following license files are associated with this item: