Project description
Shedding light on a critical blind spot in quantum Kagome materials
Kagome materials – named after a Japanese basketweave pattern their atomic arrangement resembles – host a remarkable variety of exotic electronic phenomena. Studying these requires mapping the full electronic band structure. Current photoemission spectroscopy can only probe occupied electron states, leaving a critical blind spot above the energy threshold. With the support of the Marie Skłodowska-Curie Actions programme, the IKAROS project aims to close this gap by developing a next-generation inverse photoemission set-up and applying it alongside conventional spectroscopy to three complementary Kagome compounds. It could enable the first complete high-resolution, momentum-resolved band structure maps, with unprecedented insight into the quantum phenomena that make these materials scientifically and technologically extraordinary.
Objective
Kagome materials host a unique electronic landscape, including flat bands, Dirac points, and van Hove singularities (VHS), which underpin emergent phenomena such as unconventional superconductivity, anomalous Hall effect, and topological states. These features are typically investigated with angle-resolved photoemission spectroscopy (ARPES), yet many remain inaccessible because photoemission probes only occupied states and is blind to unoccupied bands above the Fermi level. Inverse-ARPES (ARIPES) is, at present, a scarcely developed technique which is not yet suitable to perform such studies.
These technological and scientific gaps will be bridged by the IKAROS project. With IKAROS, I will contribute to the development of ARIPES, a revolutionary inverse-photoemission setup which will redefine the state of the art and will be built in the laboratory of Prof. Ghiringhelli at Politecnico di Milano. Then, I will realize the first high-resolution, momentum-resolved mapping of the full bandstructure—including unoccupied states—of representative Kagome compounds using direct and inverse photoemission spectroscopy.
The study targets three complementary systems: the prototypical CsV₃Sb₅ which hosts Dirac cones and VHS slightly above the Fermi level; FeSn, whose structure gives rise to an isolated flat band above the Fermi level, to characterize its width and quantify the electronic correlations; and Nb₃Cl₈, a new van-der-Waals Kagome material with strong correlations and thickness-dependent properties, to track the evolution of the Mott gap from the insulating bulk to the metallic monolayer. By combining ARPES and ARIPES, IKAROS will remove a critical blind spot in Kagome spectroscopy, delivering a comprehensive, momentum-resolved picture of occupied and unoccupied electronic states. Technologically, it will provide the first scientific demonstration of next-generation ARIPES, setting a new milestone in photoemission spectroscopy.
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.
- natural sciences physical sciences electromagnetism and electronics superconductivity
- natural sciences physical sciences optics spectroscopy
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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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-TMA-MSCA-PF-GF - HORIZON TMA MSCA Postdoctoral Fellowships - Global Fellowships
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(opens in new window) HORIZON-MSCA-2025-PF
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20133 Milano
Italy
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