Zobrazeno 1 - 10
of 936
pro vyhledávání: '"Hlinka J."'
Autor:
Bednyakov, P. S., Hlinka, J.
Previous experiments with BaTiO$_3$ single crystals have shown that application of the electric field in the vicinity of the ferroelectric phase transition can be used to introduce peculiar persisting ferroelectric domain walls, accompanied by the co
Externí odkaz:
http://arxiv.org/abs/2301.03409
Autor:
Baker, J. S., Paściak, M., Shenton, J. K., Vales-Castro, P., Xu, B., Hlinka, J., Márton, P., Burkovsky, R. G., Catalan, G., Glazer, A. M., Bowler, D. R.
First principles density functional theory (DFT) simulations of antiferroelectric (AFE) PbZrO$_3$ and PbHfO$_3$ reveal a dynamical instability in the phonon spectra of their purported low temperature $Pbam$ ground states. This instability doubles the
Externí odkaz:
http://arxiv.org/abs/2102.08856
Autor:
Gerster, M., Berner, R., Sawicki, J., Zakharova, A., Škoch, A., Hlinka, J., Lehnertz, K., Schöll, E.
We study patterns of partial synchronization in a network of FitzHugh-Nagumo oscillators with empirical structural connectivity measured in human subjects. We report the spontaneous occurrence of synchronization phenomena that closely resemble the on
Externí odkaz:
http://arxiv.org/abs/2007.05497
Publikováno v:
Phys. Rev. B 100, 184105 (2019)
Domain boundaries and other twin boundaries in crystalline materials are receiving increasing interest. They can carry unique functional properties, which in many cases are absent in the surrounding bulk material. One such property of domain boundari
Externí odkaz:
http://arxiv.org/abs/2005.09957
Autor:
Erb, K. C., Hlinka, J.
Publikováno v:
Phys. Rev. B 102, 024110 (2020)
The 212 species of structural phase transitions which break macroscopic symmetry are analyzed with respect to the occurrence of time-reversal invariant vector and bidirector order parameters. The possibility of discerning the orientational domain sta
Externí odkaz:
http://arxiv.org/abs/1910.00075
Autor:
Everhardt, A. S., Denneulin, T., Gruenebohm, A., Shao, Y-T., Ondrejkovic, P., Zhou, S., Domingo, N., Catalan, G., Hlinka, J., Zuo, J-M., Matzen, S., Noheda, B.
Publikováno v:
Applied Physics Reviews 7, 011402 (2020)
Proximity to phase transitions (PTs) is frequently responsible for the largest dielectric susceptibilities in ferroelectrics. The impracticality of using temperature as a control parameter to reach those large responses has motivated the design of so
Externí odkaz:
http://arxiv.org/abs/1907.09709
Autor:
Paściak, M., Ondrejkovic, P., Vanek, P., Drahokoupil, J., Steciuk, G., Palatinus, L., Welberry, T. R., Kulda, J., Fischer, H. E., Hlinka, J., Buixaderas, E.
Publikováno v:
Phys. Rev. B 99, 104102 (2019)
Neutron pair distribution function analysis and first principles calculations have been employed to study short-range correlations in heavily disordered dielectric material Sr$_x$Ba$_{1-x}$Nb$_2$O$_6$ ($x=0.35, 0.5$ and 0.61). The combination of meth
Externí odkaz:
http://arxiv.org/abs/1811.07823
Publikováno v:
Phys. Rev. B 96, 174113-1/13 (2017)
From the new infrared (IR) reflectivity and time-domain terahertz (THz) spectra combined with available high-frequency dielectric data above the MHz range in a broad temperature range of 10-900 K, a full picture of the soft and central mode behavior
Externí odkaz:
http://arxiv.org/abs/1712.06493
Publikováno v:
Phys. Rev. Lett. 120, 167601 (2018)
The three dimensional distribution of the X-ray diffuse scattering intensity of BaTiO$_3$ has been recorded in a synchrotron experiment and simultaneously computed using molecular dynamics simulations of a shell-model. Together these have allowed the
Externí odkaz:
http://arxiv.org/abs/1711.06566
Phase-field simulations demonstrate that the polarization order-parameter field in the Ginzburg-Landau-Devonshire model of rhombohedral ferroelectric BaTiO3 allows for an interesting linear defect, stable under simple periodic boundary conditions. Th
Externí odkaz:
http://arxiv.org/abs/1504.07200