Институт теоретической физики им. Л.Д. Ландау РАН
L.D. Landau Institute for Theoretical Physics RAS
International conference dedicated to the 100th anniversary of I. M. Khalatnikov
"Quantum Fluids, Quantum Field Theory, and Gravity"

October, 17-20, 2019 Chernogolovka, Russia

Mesoscopic Stoner instability in open quantum dots
Date/Time: 17:00 20-Oct-2019
The mesoscopic Stoner instability is interesting phenomenon of symmetry breaking in isolated metallic quantum dots which exists due to competition between the single-particle energy and
Heisenberg exchange interaction. To study this phenomenon in the presence of coupling to a reservoir we compute the spin susceptibility of electrons on the quantum dot for different values of tunnel coupling and temperature. Our results suggest the existence of \emph{the quantum phase transition} at the critical value of the tunneling coupling which is determined by the Stoner-enhanced exchange interaction. This quantum phase transition is manifestation of suppression of the Coleman-Weinberg mechanism of symmetry breaking by tunneling to the reservoir.

Burmistrov Igor S. (Presenter)
(no additional information)

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