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dc.contributor.authorZhakina, Elina
dc.contributor.authorDaou, Ramzy
dc.contributor.authorMaignan, Antoine
dc.contributor.authorMcGuinness, Philippa H.
dc.contributor.authorKönig, Markus
dc.contributor.authorRosner, Helge
dc.contributor.authorKim, Seo-Jin
dc.contributor.authorKhim, Seunghyun
dc.contributor.authorGrasset, Romain
dc.contributor.authorKonczykowski, Marcin
dc.contributor.authorTulipman, Evyatar
dc.contributor.authorMendez-Valderrama, Juan Felipe
dc.contributor.authorChowdhury, Debanjan
dc.contributor.authorBerg, Erez
dc.contributor.authorMackenzie, Andrew P.
dc.identifier.citationZhakina , E , Daou , R , Maignan , A , McGuinness , P H , König , M , Rosner , H , Kim , S-J , Khim , S , Grasset , R , Konczykowski , M , Tulipman , E , Mendez-Valderrama , J F , Chowdhury , D , Berg , E & Mackenzie , A P 2023 , ' Investigation of Planckian behavior in a high-conductivity oxide : PdCrO 2 ' , Proceedings of the National Academy of Sciences , vol. 120 , no. 36 , e2307334120 .
dc.descriptionFunding: JFMV and DC are supported by faculty startup grants at Cornell University. ET and EB were supported by the European Research Council (ERC) under grant HQMAT (Grant Agreement No. 817799), the Israel-US Binational Science Foundation (BSF), and the Minerva Foundation.en
dc.description.abstractThe layered delafossite metal PdCrO2 is a natural heterostructure ofhighly conductive Pd layers Kondo coupled to localized spins in the adjacent Mott insulating CrO2 layers. At high temperatures T it has a T-linearresistivity which is not seen in the isostructural but non-magnetic PdCoO2.The strength of the Kondo coupling is known, as-grown crystals are extremelyhigh purity and the Fermi surface is both very simple and experimentally known. It is therefore an ideal material platform in which to investigate 'Planckianmetal' physics. We do this by means of controlled introduction of point disorder, measurement of the thermal conductivity and Lorenz ratio and studying the sources of its high temperature entropy. The T-linear resistivity is seen to be due mainly to elastic scattering and to arise from a sum of several scattering mechanisms. Remarkably, this sum leads to a scattering rate within 10% of the Planckian value of kBT/ℏ.
dc.relation.ispartofProceedings of the National Academy of Sciencesen
dc.subjectQC Physicsen
dc.titleInvestigation of Planckian behavior in a high-conductivity oxide : PdCrO2en
dc.typeJournal itemen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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