1.
Phys Rev Lett
; 88(25 Pt 1): 256804, 2002 Jun 24.
Artículo
en Inglés
| MEDLINE
| ID: mdl-12097113
RESUMEN
We present experimental and theoretical results on a new regime in quantum dots in which the filling factor two-singlet state is replaced by new spin polarized phases. We make use of spin blockade spectroscopy to identify the transition to this new regime as a function of the number of electrons. The key experimental observation is a reversal of the phase in the systematic oscillation of the amplitude of Coulomb blockade peaks as the number of electrons is increased above a critical number. It is found theoretically that correlations are crucial to the existence of the new phases.