Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 52: Focus Session: Electron-Phonon Interactions I
O 52.3: Vortrag
Mittwoch, 3. April 2019, 11:15–11:30, H15
A real space view on the complex renormalization of quasiparticles mediated by electron-phonon interactions — •Jon Lafuente-Bartolome1,2, Peio Garcia-Goiricelaya1,2, Idoia G. Gurtubay1,2, and Asier Eiguren1,2 — 1Materia Kondentsatuaren Fisika Saila, University of the Basque Country UPV/EHU, 48080 Bilbao, Basque Country, Spain. — 2Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain.
We present a novel numerical approach to resolve the real space details of renormalized quasiparticle states and their accompanying virtual phonon cloud in interacting electron-phonon systems. The analytical continuation of the momentum dependent electron self-energy onto the complex-energy plane is performed, where multiple quasiparticle solutions of the Dyson equation can be found. Our method improves previous procedures by overcoming the particle-hole symmetry approximation, and is readily applicable to realistic systems of current interest such as monolayer MoS2, for which we show some illustrative results.