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Low T scaling behavior of 2D disordered and frustrated models

Marinari, E (Universita di Roma)
Wednesday 11 January 2006, 09:00-09:50

Seminar Room 1, Newton Institute


The ground state and low T behavior of two-dimensional spin systems with discrete binary couplings are subtle. I present an analysis based on exact computations of finite volume partition functions. I first discuss the fully frustrated model without disorder, and then introduce disorder by changing random links (spin glass) or by unfrustrating random plaquettes (plaquette disorder). In both cases the introduction of disorder changes the properties of the T=0 critical point.


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