Project description
A closer look at electron-phonon interactions
Electron-phonon interactions (EPIs) in crystals play a crucial role in solid-state physics, influencing phenomena like superconductivity and bandgap temperature dependence. While conventional studies rely on weak coupling approximations, many critical materials exhibit strong EPIs that challenge these models. For instance, the significant gap renormalisation in metallic hydrogen and ongoing research into the temperature-dependent gap of semiconductors and insulators highlight the need for more accurate methods. Supported by the Marie Skłodowska-Curie Actions programme, the GreenNP project will address these challenges through a nonperturbative adiabatic Green’s function approach using open-source first-principles calculations. Collaborating with leading experts, GreenNP seeks to elucidate the impact of strong EPIs on electronic properties, paving the way for advancements in materials science.
Objective
A fundamental area of solid state physics is the study of electrons, nuclei vibrations (phonons), and their interactions in crystals, known as electron-phonon interactions (EPIs). EPIs determine the temperature dependence of the bandgap, and lead to conventional superconductivity, among many other important phenomena. EPIs are usually studied using lowest order perturbation theory, which is only valid when the coupling is weak. However, strong EPIs have been reported in many key materials. For example, there is a huge gap renormalization of about 3 eV in high-pressure hydrogen that makes it metallic, and understanding metallic hydrogen is considered a substantial step towards understanding high-temperature superconductivity in hydrides. Research on the gap renormalization and temperature dependence of the gap of diamond is also very active, with exciting possibilities in the development of LEDs for use in extreme environments like high temperatures. However, existing calculations are not well justified, or perturbative approaches do not match experimental data. In GreenNP, we will study these and other effects due to EPIs using a rigorous nonperturbative adiabatic Green's function approach that the experienced researcher (ER) Dr. Jean Paul Nery has recently developed. Strong assets of the project will be the use of first-principles as opposed to models, and the inclusion of anharmonicities. First-principle calculations will be implemented into one of the prime open-source packages of the community, in collaboration with its renowned leading group at a nearby university; and a secondment will be carried out with a specialist in anharmonicities. By the end of the project, through the study of elemental semiconductors and insulators, there will be a clear understanding of the effects of strong EPIs in electronic properties. The ER will be taken to a leadership position in the field of EPIs and higher-order effects, with excellent future career prospects.
Fields of science (EuroSciVoc)
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.
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 atomic physics
- natural sciences physical sciences electromagnetism and electronics semiconductivity
- natural sciences physical sciences electromagnetism and electronics superconductivity
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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.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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
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.
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-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2023-PF-01
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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.
4000 LIEGE
Belgium
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.