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dc.contributor.authorKang, SD-
dc.contributor.authorDanilkin, SA-
dc.contributor.authorAydemir, U-
dc.contributor.authorAvdeev, M-
dc.contributor.authorStuder, AJ-
dc.contributor.authorSnyder, GJ-
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_US
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_US
dc.publisherIOP Scienceen_US
dc.subjectPhase transformationsen_US
dc.subjectElectric conductivityen_US
dc.subjectSeebeck effecten_US
dc.subjectPhase diagramsen_US
dc.subjectSpecific heaten_US
dc.subjectThermal diffusivityen_US
dc.titleApparent critical phenomena in the superionic phase transition of Cu2-xSeen_US
dc.typeJournal Articleen_US
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