Objective
Topological electronic phases manifest fascinating phenomena, including electronic transport via topologically-protected edge states, anomalous responses to external fields, and excitations with anyonic statistics. Harnessing these phenomena in electronic devices will lead to a technological breakthrough. The main obstacle to this has been the lack of topological systems that are simultaneously clean, versatile, robust, and highly tunable. We argue that the recent discovery of orbital Chern insulators (OCI) in graphene moiré heterostructures opens an exceptional opportunity to make a leap in our ability to manipulate topological electronic phases.
Recently, moiré superlattices in van der Waals materials emerged as a powerful tool to realize correlated electronic phases. The exciting discovery of intrinsic quantum anomalous Hall effects in graphene moiré systems revealed interaction-driven orbital Chern insulating states at zero magnetic field. Unlike in most known magnets, the magnetism in OCIs arises predominantly from the orbital motion of the electrons rather than their spins, endowing them with unique properties. Remarkably, the moiré heterostructures hosting OCIs could also be gate-tuned to superconducting, correlated insulating, and metallic isospin-ferromagnetic states, which opens unprecedented opportunities for novel devices. These unique features of OCIs set them apart and warrant their thorough investigation.
This proposal aims to establish the fundamental properties of OCIs, focusing on three key questions: (i) What are the phase diagram, isospin order, and thermodynamics of OCIs? (ii) What is the physics of the chiral edge states and domain walls in OCIs? (iii) Can strong interactions in flat moiré bands lead to fractional quantum anomalous Hall effect? To address these questions, we will apply a combination of complementary experimental techniques to probe electronic transport and thermodynamic properties in high-quality graphene moiré devices.
Fields of science (EuroSciVoc)
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CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-ERC - HORIZON ERC Grants
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2023-STG
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
3400 Klosterneuburg
Austria
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