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DTSTART:19960101T000000 END:STANDARD BEGIN:STANDARD TZNAME:GMT TZOFFSETFROM:+0100 TZOFFSETTO:+0000 DTSTART:19961027T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260427T064404Z DTSTART;VALUE=DATE-TIME:20250303T130000 DTEND;VALUE=DATE-TIME:20250303T140000 SUMMARY:WCPM: Ivana Savic\, KCL TZID:Europe/London UID:20250303-8ac672c493cda1240193cff1bb0b17c2@warwick.ac.uk CREATED:20250217T093145Z DESCRIPTION:Location: A2.05B (there will be an informal sandwich lunch ou tside D2.02 at 12.30) Time: 13.00-14.00 To join this meeting online clic k here. Link opens in a new windowLink opens in a new window Title: Firs t principles simulations of electron-phonon coupling and thermoelectric transport in PbTe I will describe our recent development of a first prin ciples thermoelectric transport model based on the Boltzmann transport t heory and its application to the classic high-performing thermoelectric material PbTe [1\,2]. Unlike nowadays standard methods which calculate e lectron-phonon matrix elements in the entire Brillouin zone using densit y functional perturbation theory and Wannier/Fourier interpolation [3]\, our model makes use of deformation potential theory\, which dramaticall y reduces the number of electron-phonon matrix elements that need to be computed. This development is important for narrow-gap semiconductors su ch as PbTe\, where the band structures are often inaccurately captured b y density functional theory\, and the effects of electron correlations o n electron-phonon matrix elements might be necessary to include [4]. Reg arding the physical effects\, I will show that soft transverse optical m odes are the key to the high thermoelectric figure of merit of PbTe: the y preserve its high electronic conductivity while suppressing the lattic e thermal conductivity [1]. I will also present our recently developed u nderstanding of the role of intervalley scattering in establishing the h igh thermoelectric figure of merit of p-type PbTe [2\,5]. [1] J. Cao\, J . D. Querales-Flores\, A. R. Murphy\, S. Fahy\, and I. Savic\, Phys. Rev . B\, 98\, 205202 (2018) [2] R. D'Souza\, J. Cao\, J. D. Querales-Flores \, S. Fahy\, and I. Savic\, Phys. Rev. B 102\, 115204 (2020) [3] S. Ponc e\, E. R. Margine\, C. Verdi\, and F. Giustino\, Comput. Phys. Commun. 2 09\, 116 (2016) [4] A. R. Murphy\, F. Murphy-Armando\, S. Fahy\, and I. Savic\, Phys. Rev. B 98\, 085201 (2018) [5] R. D'Souza\, J. D. Querales- Flores\, J. Cao\, S. Fahy\, and I. Savic\, ACS Appl. Energy Mater. 5\, 7 260 (2022) Biography: Dr Ivana Savic joined King's College London in 202 2 as a Senior Lecturer in Physics. She obtained her undergraduate degree in Electrical Engineering from the University of Belgrade\, Serbia in 2 003\, and PhD from the University of Leeds\, UK in 2006. Her postdoctora l research positions were at the Commission of Atomic Energy\, Grenoble\ , France and the University of California\, Davis\, USA. Prior to joinin g King's College London\, she led a research team at the Tyndall Nationa l Institute\, University College Cork\, Ireland. Dr Savic’s research foc us is the development of theoretical and computational approaches to cha racterise and predict the transport and ultrafast processes in bulk and nanostructured materials. LOCATION:A2.05B CATEGORIES:WCPM,Women in Science LAST-MODIFIED:20250217T093145Z ORGANIZER;CN=Sarah Jarratt: END:VEVENT END:VCALENDAR