Higher order topological defects in a moiré lattice
Fuente:
arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916198435782656 |
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| author | Gambari, Eugenio Meyer, Sebastian Guesne, Sacha David, Pascal Debontridder, Françcois Limot, Laurent Scheurer, Fabrice Brun, Christophe Dupé, Bertrand Cren, Tristan Hervé, Marie |
| author_facet | Gambari, Eugenio Meyer, Sebastian Guesne, Sacha David, Pascal Debontridder, Françcois Limot, Laurent Scheurer, Fabrice Brun, Christophe Dupé, Bertrand Cren, Tristan Hervé, Marie |
| contents | Topological defects are ubiquitous, they manifest in a wide variety of systems such as liquid crystals, magnets or superconductors. The recent quest for nonabelian 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, in this study we propose 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. Here we demonstrate 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). Surprizingly, these higher order dislocations arise from ordinary simple edge dislocations in the atomic lattice of CrCl3. We provide a theoretical framework explaining the higher order dislocations as vortex with a winding Chern number of 2. We expect that these original defects could stabilize some anyons either in a 2D quantum magnet or within a 2D superconductor coupled to it. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_06176 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Higher order topological defects in a moiré lattice Gambari, Eugenio Meyer, Sebastian Guesne, Sacha David, Pascal Debontridder, Françcois Limot, Laurent Scheurer, Fabrice Brun, Christophe Dupé, Bertrand Cren, Tristan Hervé, Marie Mesoscale and Nanoscale Physics Materials Science Topological defects are ubiquitous, they manifest in a wide variety of systems such as liquid crystals, magnets or superconductors. The recent quest for nonabelian 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, in this study we propose 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. Here we demonstrate 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). Surprizingly, these higher order dislocations arise from ordinary simple edge dislocations in the atomic lattice of CrCl3. We provide a theoretical framework explaining the higher order dislocations as vortex with a winding Chern number of 2. We expect that these original defects could stabilize some anyons either in a 2D quantum magnet or within a 2D superconductor coupled to it. |
| title | Higher order topological defects in a moiré lattice |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2404.06176 |