[en] AbstractTopological defects are ubiquitous, they manifest in a wide variety of systems such as liquid crystals, magnets or superconductors. The recent quest for non‐abelian anyons in condensed matter physics stimulates the interest for topological defects since they can be hosted in vortices in quantum magnets or topological superconductors. In addition to these vortex defects, this study proposes to investigate edge dislocations in 2D magnets as new building blocks for topological physics since they can be described as vortices in the structural phase field. It demonstrates the existence of higher order topological dislocations within the higher order moiré pattern of the van der Waals 2D magnet CrCl3 deposited on Au(111). Surprisingly, these higher order dislocations arise from ordinary simple edge dislocations in the atomic lattice of CrCl3. This study provide a theoretical framework explaining the higher order dislocations as vortices with a winding Chern number of 2. It is expected that these original defects can stabilize some anyons either in a 2D quantum magnet or within a 2D superconductor coupled to it.
Disciplines :
Physics
Author, co-author :
Gambari, Eugenio; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Meyer, Sebastian ; Université de Liège - ULiège > Département de physique > Topological Orders in Matter (TOM) ; Fonds de la Recherche Scientifique (FRS‐FNRS) Bruxelles B‐1000 Belgium
Guesne, Sacha; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
David, Pascal; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Debontridder, François; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Limot, Laurent; Université de Strasbourg CNRS Institut de Phsyique et Chime des Matériaux de Strasbourg UMR7504 Strasbourg F‐67000 France
Scheurer, Fabrice; Université de Strasbourg CNRS Institut de Phsyique et Chime des Matériaux de Strasbourg UMR7504 Strasbourg F‐67000 France
Brun, Christophe; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Dupé, Bertrand ; Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures ; Fonds de la Recherche Scientifique (FRS‐FNRS) Bruxelles B‐1000 Belgium
Cren, Tristan; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Hervé, Marie ; Sorbonne Université CNRS Institut des Nanosciences de Paris UMR7588, 4 place Jussieu Paris 75005 France
Language :
English
Title :
Higher Order Topological Defects in a Moiré Lattice
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