From ScienceDirect:
Electric field induced phase transition in first order ferroelectrics with large zero point energy
Abstract
An electric field induced phase transition in first order
ferroelectrics with very large zero point energy is studied on the
framework of the effective field approach. It is well known that when
the zero point energy of a system is relatively large, the
ferroelectric behaviour is depressed and no phase transition can be
observed. The critical value Ωcf of zero point
energy for whom the phase transition disappears turns out to be
dependant on the order of transition. For zero point energies larger
than this critical value, a phase transition may be induced applying an
external electric field.
This temperature dependence of the induced
polarization shows a discontinuous step when the applied electric field
is weak, but becoming a continuous one at a strong applied electric
field. Another critical value of zero point energy Ωcp>Ωcf is deduced for which no phase transition at all can be attained.
Physica A: Statistical Mechanics and its Applications
Volume 387, Issue 1,
1 January 2008,
Pages 115-122
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Preliminary considerations towards a theoretical foundation of the zero point energy additivity rules
AbstractA new method is presented for the
analysis of zero point energies of linear chains and their generalized
analogues. The aspect of form and topological considerations play a
fundamental role in the method.
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