Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Verri G"'
Publikováno v:
J. Phys. Energy 6 035003 (2024)
We present a minimal Landau theory of plastic-to-crystal phase transitions in which the key components are a multipole-moment order parameter that describes the orientational ordering of the constituent molecules, coupling between such order paramete
Externí odkaz:
http://arxiv.org/abs/2309.02316
Publikováno v:
Phys. Rev. Lett. 131, 046801 (2023)
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 interaction is known to hybridize acoustic and optic phonon modes and l
Externí odkaz:
http://arxiv.org/abs/2205.14171
Publikováno v:
Phys. Rev. B 100, 214111 (2019)
The effect of ferroelectric fluctuations on the temperature dependent dielectric constant of SrTiO$_3\,$(STO) has been long studied. Those fluctuations have been shown in recent years to be quantum critical and STO demonstrated to form the archetypal
Externí odkaz:
http://arxiv.org/abs/1905.04949
Publikováno v:
Front. Chem. 6, 545 (2018)
Negative thermal expansion (NTE) describes the anomalous propensity of materials to shrink when heated. Since its discovery, the NTE effect has been found in a wide variety of materials with an array of magnetic, electronic and structural properties.
Externí odkaz:
http://arxiv.org/abs/1809.11040
Publikováno v:
Phys. Rev. Materials 2, 104804 (2018)
We examine the effects of strain and cation substitution on the superconducting phase of polar semiconductors near a ferroelectric quantum phase transition with a model that combines a strong coupling theory of superconductors with a standard microsc
Externí odkaz:
http://arxiv.org/abs/1801.08736
Publikováno v:
Phys. Rev. Materials 1, 053601 (2017)
The structural phase transitions of MF$_3$ (M=Al, Cr, V, Fe, Ti, Sc) metal trifluorides are studied within a simple Landau theory consisting of tilts of rigid MF$_6$ octahedra associated with soft antiferrodistoritive optic modes that are coupled to
Externí odkaz:
http://arxiv.org/abs/1708.01158
Akademický článek
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Publikováno v:
Nature 576, 429 (2019)
Metal to insulator transitions (MITs) driven by strong electronic correlations are common in condensed matter systems, and are associated with some of the most remarkable collective phenomena in solids, including superconductivity and magnetism. Tuni
Externí odkaz:
http://arxiv.org/abs/1701.02318
Publikováno v:
npj Quantum Materials 2, 28 (2017)
Relaxor ferroelectrics are complex oxide materials which are rather unique to study the effects of compositional disorder on phase transitions. Here, we study the effects of quenched cubic random electric fields on the lattice instabilities that lead
Externí odkaz:
http://arxiv.org/abs/1612.07667
Akademický článek
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