%0 Conference Proceedings
%T Compensation of the spin of a quantum dot at Coulomb blockade
%+ Groupe d'étude des semiconducteurs (GES)
%A Jouault, Benoit
%A Giuliano, D.
%A Tagliacozzo, A.
%< avec comité de lecture
%Z GES:01-004
%( Macroscopic coherence and Quantum Computing
%B Macroscopic coherence and Quantum Computing
%C Naples, Italy
%Y D. V. Averin, B. Ruggiero and P. Silvestrini
%I Kluwer Academi Publishers
%P 325
%8 2000-06-14
%D 2000
%Z cond-mat/0102039
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Conference papers
%X We discuss a new entangled state that has been observed in the conduction across a quantum dot. At Coulomb blockade, electrons from the contacts correlate strongly to those localized in the dot, due to cotunneling processes. Because of the strong Coulomb repulsion on the dot, its electron number is unchanged w.r.to the dot in isolation, but the total spin is fully or partly compensated. In a dot with N=even at the singlet-triplet crossing, which occurs in large magnetic field, Kondo correlations lead to a total spin S=1/2.
%G English
%L hal-00544546
%U https://hal.science/hal-00544546
%~ CNRS
%~ UNIV-MONTP2
%~ GES
%~ UNIV-MONTPELLIER
%~ UM1-UM2