Exploració per autor "Gebbia, Jonathan Fernando"
Ara es mostren els items 1-10 de 10
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Disentangling a and ß relaxation in orientationally disordered crystals with theory and experiments
(American Institute of Physics (AIP), 2018-05-21)
Article
Accés obertWe use a microscopically motivated Generalized Langevin Equation (GLE) approach to link the vibrational density of states (VDOS) to the dielectric response of orientational glasses (OGs). The dielectric function calculated ... -
Dynamics and local ordering of pentachloronitrobenzene: a molecular-dynamics investigation
(Royal Society of Chemistry (RSC), 2023-11-06)
Article
Accés obertPlastic phases are constituted by molecules whose centers of mass form a long range ordered crystalline lattice, but rotate in a more or less constrained way. Pentachloronitrobenzene (PCNB) is a quasi-planar hexa-substituted ... -
Emergence of glassy features in halomethane crystals
(American Physical Society (APS), 2019-01-02)
Article
Accés obertBoth structural glasses and disordered crystals are known to exhibit anomalous thermal, vibrational, and acoustic properties at low temperatures or low energies, what is still a matter of lively debate. To shed light on ... -
Glassy Anomalies in the Low-Temperature Thermal Properties of a Minimally Disordered Crystalline Solid
(2017-11-21)
Article
Accés obertThe low-temperature thermal and transport properties of an unusual kind of crystal exhibiting minimal molecular positional and tilting disorder have been measured. The material, namely, low-dimensional, highly anisotropic ... -
Heat capacity anomalies of the molecular crystal 1-fluoro-adamantane at low temperatures
(Nature, 2021-09-20)
Article
Accés obertDisorder–disorder phase transitions are rare in nature. Here, we present a comprehensive low-temperature experimental and theoretical study of the heat capacity and vibrational density of states of 1-fluoro-adamantane ... -
Low-Temperature Heat Capacity Anomalies in Ordered and Disordered Phases of Normal and Deuterated Thiophene
(2021-03-04)
Article
Accés obertWe measured the specific heat Cp of normal (C4H4S) and deuterated (C4D4S) thiophene in the temperature interval of 1 = T, K = 25. C4H4S exhibits a metastable phase II2 and a stable phase V, both with frozen orientational ... -
Modelling shape-memory effects in ferromagnetic alloys
(Springer, 2015-07-21)
Article
Accés restringit per política de l'editorialWe develop a combined Ginzburg–Landau/micromagnetic model dealing with conventional and magnetic shape-memory properties in ferromagnetic shape-memory materials. The free energy of the system is written as the sum of ... -
Multiferroic and related hysteretic behavior in ferromagnetic shape memory alloys
(2017-08-29)
Article
Accés obertWe combine a Ginzburg–Landau model for a ferroelastic transition with the theory of micromagnetism to study the magnetostructural behavior leading to multicaloric effects in ferromagnetic shape memory alloys. We analyze ... -
Propiedades vitreas emergentes en cristales moleculares
(Universitat Politècnica de Catalunya, 2021-10-06)
Tesi
Accés obertOne of the most complex and unsolved problems in physics is the glass transition problem, in which the resulting state, the glass, exhibits unique and anomalous properties. During the transition, a kinetic freezing phenomenon ... -
Secondary relaxation in the terahertz range in 2-adamantanone from theory and experiments
(American Physical Society (APS), 2020-03-20)
Article
Accés obertWe applied the recently developed Generalized Langevin equation (GLE) approach for dielectric response of liquids and glasses to link the vibrational density of states (VDOS) to the dielectric response of a model orientational ...
