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A thermodynamic model for the simultaneous charge/spin order transition in LaCu3Fe4O12
(IOP Publishing, 2012-11)
LaCu3Fe4O12 undergoes a phase transition at 393 K from an antiferromagnetic insulating state at low temperatures to a paramagnetic metallic state above the critical temperature. We build a basic model for the electronic ...
Q-deformed fermionic Lipkin model at finite temperature
(1997-08-15)
The interplay between temperature and q-deformation in the phase transition properties of many-body systems is studied in the particular framework of the collective q-deformed fermionic Lipkin model. It is shown that in ...
Nonequilibrium quantum phase transitions in the XY model: comparison of unitary time evolution and reduced density operator approaches
(IOP Publishing, 2014)
We study nonequilibrium quantum phase transitions in the XY spin 1/2 chain
using the C* algebra. We show that the well-known quantum phase transition at
a magnetic field of h = 1 also persists in the nonequilibrium setting ...