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Quantum disordering and the phase diagram of Josephson junction arrays

Said Sakhi

I present a theoretical analysis of the phase diagram of Josephson junction arrays in the presence of charge and magnetic frustration. Using a dual description I show that the fundamental constituents of this theory are electric and magnetic excitations and that their condensations lead to a plethora of possible phases. The new formulation points out to the emergence of a rich phase diagram not attainable by standard mean field theory approaches. In addition to the usual superconducting and insulating states, I find, in the bilayer system, states exhibiting Hall quantization coexisting with interlayer coherence, states with Hall quantization without interlayer coherence and interlayer coherent states without Hall quantization.

Lundi, 4 Juin, 2007 - 22:30
Lieu de Séminaire: 
Room V-221, Pavillon Roger Gaudry

Groupe de Physique des particules
​Université de Montréal
C.P. 6128, Succ. Centre-ville,
Montréal, QC H3C 3J7
Tél : 514-343-5607
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