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SUMMARY:Electron-phonon physics from first principles
DTSTART:20181205T161500
DTEND:20181205T171500
DTSTAMP:20260408T104959Z
UID:33d66eb1fb9b23a722367e2b68c3748abebacaaae19df50c29f5b1ab
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Feliciano Giustino (University of Oxford\, UK)\nElectron
 -phonon interactions (EPIs) are ubiquitous in condensed matter and materia
 ls physics. For example EPIs play a central role in the electrical resisti
 vity of metals\, the carrier mobility of semiconductors\, the pairing mech
 anism of conventional superconductors\, and the optical properties of indi
 rect-gap materials. More fundamentally\, the EPI is the simplest realizati
 on of the interaction between fermion and boson fields\, arguably one of t
 he pillars of many-particle physics and quantum electrodynamics. The EPI h
 as been studied for almost a century\, however only during the last two de
 cades predictive\, non-empirical calculations have become possible. In thi
 s talk I will outline the theoretical and computational framework underlyi
 ng modern electron-phonon calculations from first principles\, and illustr
 ate recent progress in this area by discussing representative work from ou
 r group. In particular I will touch upon our recent investigations of pola
 rons in the angle-resolved photoelectron spectra of transition metal oxide
 s [1\,2]\, the superconducting pairing mechanism in transition metal dicha
 lcogenides [3]\, non-adiabatic Kohn anomalies in the inelastic X-ray scatt
 ering spectra of doped semiconductors [4]\, and the phonon-induced renorma
 lization of carrier effective masses in halide perovskites [5]. I will con
 clude by discussing opportunities for future work\, and the key challenges
  for advancing theoretical and computational research on electron-phonon p
 hysics [5].\n\n[1] C. Verdi et al.\, Nat. Commun. 8\, 15769 (2017).\n[2] J
 . M. Riley et al.\, Nat. Commun. 9\, 2305 (2018).\n[3] C. Heil et al.\, Ph
 ys. Rev. Lett.\, 119\, 087003 (2017).\n[4] F. Caruso et al.\, Phys. Rev. L
 ett. 119\, 017001 (2017).\n[5] M. Schlipdf et al.\, Phys. Rev. Lett. 121\,
  086402 (2018).\n\nAbout the speaker\nFeliciano Giustino is Full Professor
  of Materials at the University of Oxford\, and during AY 2017/18 he was t
 he Mary Shepard B. Upson Visiting Professor in Engineering at Cornell Univ
 ersity. He holds an MSc in Nuclear Engineering from Politecnico di Torino 
 and a PhD in Physics from the Ecole Polytechnique Fédérale de Lausanne. 
 Before joining the Department of Materials at Oxford he was a postdoc in t
 he Physics Department of the University of California at Berkeley. He spec
 ialises in electronic structure theory and the atomic-scale design of adva
 nced materials for electronics\, photonics\, and energy. He is author of 1
 20+ research papers and one book on Materials Modelling using Density Func
 tional Theory. He started the open-source software project EPW\, which is 
 currently distributed as a core module of the Quantum ESPRESSO materials s
 imulation suite.\n\n17th NCCR MARVEL "Distinguished Lecture"
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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