Journal
SURFACE SCIENCE
Volume 630, Issue -, Pages 337-342Publisher
ELSEVIER
DOI: 10.1016/j.susc.2014.07.009
Keywords
Kondo exchange; Spins; Single atom; Renormalization
Categories
Funding
- Engineering and Physical Sciences Research Council UK [EP/D063604/1, EP/H002367/1]
- Leverhulme Trust [RPG-2012-754]
- Ministry of Science and Education Spain [FIS2010-21883-C02-01, MAT2010-19236, CSD2007-0010]
- European Commission FP7 Programme [PER-GA-2009-251791]
- GV grant Prometeo [2012-11]
- Engineering and Physical Sciences Research Council [EP/D063604/1, EP/H002367/1] Funding Source: researchfish
- EPSRC [EP/D063604/1, EP/H002367/1] Funding Source: UKRI
Ask authors/readers for more resources
When individual quantum spins are placed in close proximity to conducting substrates, the localized spin is coupled to the nearby itinerant conduction electrons via Kondo exchange. In the strong coupling limit this can result in the Kondo effect - the formation of a correlated, many body singlet state - and a resulting renormalization of the density of states near the Fermi energy. However, even when Kondo screening does not occur, Kondo exchange can give rise to a wide variety of other phenomena. In addition to the well known renormalization of the g factor and the finite spin decoherence and relaxation times, Kondo exchange has recently been found to give rise to a newly discovered effect: the renormalization of the single ion magnetic anisotropy. Here we put these apparently different phenomena on equal footing by treating the effect of Kondo exchange perturbatively. In this formalism, the central quantity is rho J, the product of the density of states at the Fermi energy rho and the Kondo exchange constant J. We show that perturbation theory correctly describes the experimentally observed exchange induced shifts of the single spin excitation energies, demonstrating that Kondo exchange can be used to tune the effective magnetic anisotropy of a single spin. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available