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dc.creatorOcchialini, Connor A.
dc.creatorGuzmán Verri, Gian Giacomo
dc.creatorHandunkanda, Sahan U.
dc.creatorHancock, Jason N.
dc.descriptionInvited paper for Frontiers Chemistry (Research Topic: Towards the Control of Thermal Expansion: from 1996 to today)es_ES
dc.description.abstractNegative 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. In some cases, the NTE originates from phase competition arising from the electronic or magnetic degrees of freedom but we here focus on a particular class of NTE which originates from intrinsic dynamical origins related to the lattice degrees of freedom, a property we term \textit{structural} negative thermal expansion (SNTE). Here we review some select cases of NTE which strictly arise from anharmonic phonon dynamics, with a focus on open perovskite lattices. We find that NTE is often present close in proximity to competing structural phases, with structural phase transition lines terminating near $T$=0 K yielding the most superlative displays of the SNTE effect. We further provide a theoretical model to make precise the proposed relationship among the signature behavior of SNTE, the proximity of these systems to structural quantum phase transitions and the effects of phase fluctuations near these unique regions of the structural phase diagram. The effects of compositional disorder on NTE and structural phase stability in perovskites are discussed.es_ES
dc.description.sponsorshipNational Science Foundation Award/[DMR-1506825]/NSF/Estados Unidoses_ES
dc.description.sponsorshipBasic Energy Sciences/[DE-AC02-06CH11357]/BES/Estados Unidoses_ES
dc.description.sponsorshipUniversidad de Costa Rica/[816-B7-601]/UCR/Costa Ricaes_ES
dc.description.sponsorshipBasic Energy Sciences/[DE-1243 SC0016481]/BES/Estados Unidoses_ES
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.sourceFrontiers Chemistry. 2018es_ES
dc.subjectNegative thermal expansiones_ES
dc.subjectStructural negative thermal expansiones_ES
dc.subjectQuantum phase transitiones_ES
dc.subjectStructural phase transitiones_ES
dc.subjectAntiferrodistortive phase transitiones_ES
dc.subjectScandium trifluoridees_ES
dc.titleNegative Thermal Expansion in Open Perovskites near the Precipice of Structural Stabilityes_ES
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA)es_ES

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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional