%0 Journal Article
%T Sequential magnetotunneling in a vertical quantum dot tuned at the crossing to higher spin states
%+ Groupe d'étude des semiconducteurs (GES)
%A Jouault, Benoit
%A Santoro, G.
%A Tagliacozzo, A.
%< avec comité de lecture
%Z GES:00-001
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 61
%P 10242-10246
%8 2000
%D 2000
%K ELECTRON-ELECTRON INTERACTIONS
%K NONLINEAR TRANSPORT
%K ADDITION SPECTRA
%K MAGNETIC-FIELDS
%K BLOCKADE
%K OSCILLATIONS
%K SPECTROSCOPY
%K SINGLE
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X We have calculated the Linear magnetoconductance across a vertical parabolic quantum dot with a magnetic field in the direction of the current. Gate voltage and magnetic field an tuned at the degeneracy point between the occupancies N=2 and N=3, close to the singlet-triplet transition for N=2. We find that the conductance is enhanced prior to the transition by nearby crossings of the levels of the three-particle dot. Immediately after it is depressed by roughly 1/3, as long as the total spin S of the three-electron ground state doesn't change from S=1/2 to S=3/2, due to spin selection rule. At low temperature this dip is very sharp, but the peak is recovered by increasing the temperature.
%G English
%L hal-00544482
%U https://hal.science/hal-00544482
%~ CNRS
%~ UNIV-MONTP2
%~ GES
%~ UNIV-MONTPELLIER
%~ UM1-UM2