Thèse Supraconductivité Non Conventionnelle dans les Hétérostructures de Vdw. H/F - Doctorat.Gouv.Fr

Établissement : Université Paris-Saclay GS Sciences de l'ingénierie et des systèmes
École doctorale : Interfaces : matériaux, systèmes, usages
Laboratoire de recherche : [UMR 8580] Laboratoire Structures, Propriétés, Modélisation des Solides
Direction de la thèse : Gianguido BALDINOZZI ORCID 0000000269090716
Début de la thèse : 2026-10-01
Date limite de candidature : 2026-06-05T23:59:59

One of the central challenges in quantum information processing is encoding quantum states in a way that remains robust against environmental noise. Topological quantum matter oers a way to avoid environmental noise by storing information non-locally, thereby protecting it from common sources of decoherence. However, despite this advantage, scalability remains a major obstacle, largely due to the limited tunability of existing experimental platforms. Van der Waals (vdW) heterostructures provide a promising path forward thanks to their exceptional tunability, which enables precise control over key parameters such as interaction strength, symmetry breaking, and carrier density [1]. Their weak interlayer bonding allows pristine monolayers to be exfoliated and reassembled with well-defined relative orientation. Stacking and twisting introduce additional degrees of freedom; in particular, twisted bilayers form moiré superlattices that can induce band inversions and generate flat bands, where quenched kinetic energy strongly enhances interaction eects. These features make vdW heterostructures ideal for exploring exotic phases arising from the interplay of correlations, symmetry, and topology.

Develop a theoretical framework for emergent topological quantum phenomena in tunable van der Waals heterostructures. In particular, this work aims to elucidate how stacking and twisting vdW monolayers generate band crossings and enhance interactions, enabling the emergence and control of topological phases, as well as to characterize their boundary modes and dynamics.

The aim of this thesis is to identify topological superconducting phases in vdW heterostructures and characterize their boundary modes and experimental signatures. A further goal is to determine experimental platforms that permit the dynamical control of these phases and their protected boundary modes for quantum information processing. Finally to analyze the transport behavior associated with such dynamical modulation, and to evaluate the sources of decoherence and dissipation that arise during the manipulations.

Keldysh, BCS and self consistent gap equation, scattering matrix, renormalization group and related field theoretical techniques.

Mater's in physics. Good knowledge in solid-state physics and quantum many-body theory. Proficiency in Python.