Apparent critical phenomena in the superionic phase transition of Cu2-xSe

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dc.contributor.authorKang, SDen_AU
dc.contributor.authorDanilkin, SAen_AU
dc.contributor.authorAydemir, Uen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorSnyder, GJen_AU
dc.date.accessioned2020-12-07T03:50:42Zen_AU
dc.date.available2020-12-07T03:50:42Zen_AU
dc.date.issued2016-01-11en_AU
dc.date.statistics2020-12-07en_AU
dc.description.abstractThe superionic phase transition of Cu2-xSe accompanies drastic changes in transport properties. The Seebeck coefficient increases sharply while the electrical conductivity and thermal diffusivity drops. Such behavior has previously been attributed to critical phenomena under the assumption of a continuous phase transition. However, applying Landau's criteria suggests that the transition should be first order. Using the phase diagram that is consistent with a first order transition, we show that the observed transport properties and heat capacity curves can be accounted for and modeled with good agreement. The apparent critical phenomena is shown to be a result of compositional degree-of-freedom. Understanding of the phase transition allows to explain the enhancement in the thermoelectric figure-of-merit that is accompanied with the transition. © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaften_AU
dc.identifier.articlenumber013024en_AU
dc.identifier.citationKang, S. D., Danilkin, S. A., Aydemir, U., Avdeev, M., Studer, A. & Snyder, G. J. (2016). Apparent critical phenomena in the superionic phase transition of Cu2-xSe. New Journal of Physics, 18, 013024. doi:10.1088/1367-2630/18/1/013024en_AU
dc.identifier.issn1367-2630en_AU
dc.identifier.journaltitleNew Journal of Physicsen_AU
dc.identifier.urihttps://doi.org/10.1088/1367-2630/18/1/013024en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10070en_AU
dc.identifier.volume18en_AU
dc.language.isoenen_AU
dc.publisherIOP Scienceen_AU
dc.subjectPhase transformationsen_AU
dc.subjectElectric conductivityen_AU
dc.subjectSeebeck effecten_AU
dc.subjectPhase diagramsen_AU
dc.subjectSpecific heaten_AU
dc.subjectThermal diffusivityen_AU
dc.titleApparent critical phenomena in the superionic phase transition of Cu2-xSeen_AU
dc.typeJournal Articleen_AU
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