Ciorga, Mariusz and Wensauer, Andreas and Pioro-Ladriere, Michel and Korkusinski, Marek and Kyriakidis, Jordan and Sachrajda, Andrew S. and Hawrylak, Pawel (2002) Collapse of the spin-singlett phase in quantum dots. Physical Review Letters 88 (25), p. 256804.
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Other URL: http://link.aps.org/abstract/PRL/v88/e256804
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.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:55|