Description du projet
Des structures topologiques basées sur des super-réseaux de chalcogénures
Financé par le programme Actions Marie Skłodowska-Curie, le projet MagTopCSL a pour objectif d’étudier les super-réseaux et les hétérostructures dans les matériaux à base de chalcogénures afin de les utiliser en tant que plateformes dans des dispositifs topologiques. À cette fin, le projet étudiera les super-réseaux créés en superposant des couches simples et doubles de dichalcogénures de métaux de transition avec des réseaux périodiques d’adatomes magnétiques dans diverses configurations. Le projet étudiera également les hétérostructures multicouches de monochalcogénures du groupe II. L’interaction des structures électroniques sous-jacentes avec les ingrédients et les configurations de la superstructure pourrait conduire à de nouvelles phases de Hall aux propriétés hautement modifiées.
Objectif
I will explore superlattices and heterostructures in chalcogenide materials as a platform for Berry-curvature engineering and topological devices. To this end, I will study superlattices created by superimposing single- and bilayers of transition-metal dichalcogenides with periodic arrays of magnetic adatoms in various configurations. Moreover, I will study multilayer heterostructures of group-II monochalcogenides with a compositional gradient across layers. The interplay of the underlying electronic structures with the ingredients and configurations of the superstructures is envisioned to lead to new phases with highly altered properties. I will study this interplay theoretically with a focus on three main objectives: (i) designing quantum anomalous Hall phases with large Chern numbers, which is highly relevant for electronic devices with low-power consumption; (ii) realizing topological superconductors as a platform for Majorana quasiparticles, which hold potential for exotic nonlocal phenomena and quantum computers; and (iii) realizing stable intertwined order in a 3D material with flat energy bands, a research direction I will pioneer with this project.
I will model the proposed setups numerically using low-energy tight-binding models of the materials. The models will be constructed in close collaboration with experimentalists and DFT experts at the host institution MagTop within IF PAN. I will calculate Berry curvature, topological invariants, magnetic order, phase diagrams, and signatures of the emerging phases with regard to charge, spin, and thermal transport. The code used for the calculation of these quantities will be implemented as a software package, which I will utilize and develop during this project. My investigations will provide concrete guidelines for accompanying experimental studies at MagTop. In this way, the outcomes of my project will lay the foundation for tunable topological devices based on chalcogenide superlattices and heterostructures.
Champ scientifique
- natural sciencescomputer and information sciencessoftware
- natural sciencesmathematicspure mathematicstopology
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwarequantum computers
- natural sciencesphysical scienceselectromagnetism and electronicssuperconductivity
Mots‑clés
Programme(s)
Régime de financement
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinateur
02 668 Warszawa
Pologne