Journal
PHYSICAL REVIEW LETTERS
Volume 94, Issue 3, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.036802
Keywords
-
Categories
Ask authors/readers for more resources
We interpret the recent observation of a zero-bias anomaly in spin-1 quantum dots in terms of an underscreened Kondo effect. Although spin-1 quantum dots are expected to undergo a two-stage quenching effect, in practice the log-normal distribution of Kondo temperatures leads to a broad temperature region dominated by underscreened Kondo physics. General arguments, based on the asymptotic decoupling between the partially screened moment and the leads, predict a singular temperature and voltage dependence of the conductance G and differential conductance g, resulting in dg/dTsimilar to1/T and dG/dVsimilar to1/V. Using a Schwinger boson approach, we show how these qualitative expectations are borne out in a detailed many body calculation.
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