Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série SEM-LPTMC
Domaines cond-mat.mes-hall
Date Lundi 16 Novembre 2020
Heure 10:45
Institut LPTMC
Salle On-line zoom seminar
Nom de l'orateur Kaladzhyan
Prenom de l'orateur Vardan
Addresse email de l'orateur vardan [dot] kaladzhyan [at] phystech [dot] edu
Institution de l'orateur University of Basel
Titre Boundary Modes from Impurity-induced States
Résumé We provide a new and exact formalism to describe the formation of end, edge or surface states through the evolution of impurity-induced states. We propose a general algorithm that consists of finding the impurity states via the T-matrix formalism and showing that they morph into boundary modes when the impurity potential goes to infinity. We apply this technique to obtain both topological and trivial boundary modes in various models. Furthermore, we demonstrate that the technique provides a non-recursive analytical way of computing boundary Green's functions. To provide an example, we use the latter to calculate exactly quasiparticle interference patterns on the surface of Weyl semimetals, and we compare our findings with the previously obtained results based on the joint density of states approach, demonstrating the experimental relevance and importance of our method.
Numéro de preprint arXiv
Commentaires https://zoom.us/j/93520463813?pwd=YmYrRThkNE1pS0J0bGlHdG11SklTZz09 ID de réunion : 935 2046 3813 Code secret : 096019
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