27 citations · 66 across the 6 of their papers we have counts for
6 papers
Lamellar fluctuations melt ferroelectricity
G. G. Guzmán-Verri, C. H. Liang, P. B. Littlewood
We consider a standard Ginzburg-Landau model of a ferroelectric whose electrical polarization is coupled to gradients of elastic strain. At the harmonic level, such flexoelectric i…
Pressure dependence of ferroelectric quantum critical fluctuations
M. J. Coak, C. R. S. Haines, C. Liu +2
The effect of ferroelectric fluctuations on the temperature dependent dielectric constant of SrTiO(STO) has been long studied. Those fluctuations have been shown in recent ye…
Why is the electrocaloric effect so small in ferroelectrics?
G. G. Guzmán-Verri, P. B. Littlewood
Ferroelectrics are attractive candidate materials for environmentally friendly solid state refrigeration free of greenhouse gases. Their thermal response upon variations of externa…
Paraelectric and Ferroelectric States in a Model for Relaxor Ferroelectrics
G. G. Guzmán-Verri, P. B. Littlewood, C. M. Varma
We study the free energy landscape of a minimal model for relaxor ferroelectrics. Using a variational method which includes leading correlations beyond the mean-field approximation…
Structure Factor of a Relaxor Ferroelectric
G. G. Guzmán-Verri, C. M. Varma
We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure…
A variational method in the problem of screening an external charge in strongly correlated metals
G. G. Guzmán-Verri, Arkady Shekhter, C. M. Varma
We describe a variational calculation for the problem of screening of a point charge in a layered correlated metal for dopings close to the Mott transition where the screening is n…