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Electron-electron scattering and thermal conductivity of epsilon-iron at Earths core conditions
University of Paris Saclay, France; Coll France, France; National University of Science and Technology MISIS, Russia.
Jozef Stefan Institute, Slovenia.
University of Paris Saclay, France; Coll France, France; University of Geneva, Switzerland.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
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2017 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 19, 073022Article in journal (Refereed) Published
Abstract [en]

The electronic state and transport properties of hot dense iron are of the utmost importance for the understanding of Earths interior. Combining state-of-the-art density functional and dynamical mean field theories we study the impact of electron correlations on the electrical and thermal resistivity of hexagonal close-packed epsilon-Fe at Earths core conditions and show that the electron-electron scattering in epsilon-Fe exhibit a nearly perfect Fermi-liquid (FL) behavior. Accordingly, the quadratic dependence of the scattering rate, typical of FLs, leads to a modification of the Wiedemann-Franz law and suppresses the thermal conductivity with respect to the electrical one. The consequence is a significant increase of the electron-electron thermal resistivity, which is found to be of comparable magnitude to the electron-phonon one.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2017. Vol. 19, 073022
Keyword [en]
thermal conductivity; electronic correlations; electronic structure calculations; iron; extreme conditions
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-140525DOI: 10.1088/1367-2630/aa76c9ISI: 000407785200001OAI: oai:DiVA.org:liu-140525DiVA: diva2:1140100
Note

Funding Agencies|European Research Council [ERC-319286 QMAC]; Slovenian Research Agency (ARRS) [P1-0044]; Swedish Research Council (VR) [2014-4750, 2015-04391]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Ministry of Education and Science of the Russian Federation [14.Y26.31.0005]

Available from: 2017-09-11 Created: 2017-09-11 Last updated: 2017-09-11

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CiteExportLink to record
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