dc.creatorOcchialini, Connor A.
dc.creatorGuzmán Verri, Gian Giacomo
dc.creatorHandunkanda, Sahan U.
dc.creatorHancock, Jason N.
dc.date.accessioned2018-11-05T20:28:12Z
dc.date.accessioned2019-04-25T14:46:04Z
dc.date.available2018-11-05T20:28:12Z
dc.date.available2019-04-25T14:46:04Z
dc.date.created2018-11-05T20:28:12Z
dc.date.issued2018
dc.identifierhttps://www.frontiersin.org/articles/10.3389/fchem.2018.00545/abstract
dc.identifier2296-2646
dc.identifierhttp://hdl.handle.net/10669/76058
dc.identifier10.3389/fchem.2018.00545
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/2374353
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.
dc.languageen_US
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.sourceFrontiers Chemistry. 2018
dc.subjectNegative thermal expansion
dc.subjectStructural negative thermal expansion
dc.subjectQuantum phase transition
dc.subjectStructural phase transition
dc.subjectPerovskite
dc.subjectAntiferrodistortive phase transition
dc.subjectScandium trifluoride
dc.titleNegative Thermal Expansion in Open Perovskites near the Precipice of Structural Stability
dc.typeinfo:eu-repo/semantics/preprint
dc.typePreprint


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