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COUPE - COUPling Excitations

Project description

New theoretical approach to describing the electron-boson coupling

The interaction of electrons with bosons influences the spectral properties of solids in a profound way. Bosons can be crystal lattice vibrations (phonons), collective charge-density fluctuations (plasmons) or bound states of electrons and electron holes (excitons). The GW approximation produces accurate calculations of the quasiparticle energies across a range of materials. Bosonic excitations are described through the time-dependent density-functional theory (TDDFT). Currently, there are few approaches that describe the electron-boson coupling. The EU-funded COUPE project proposes a new combination of GW and TDDFT that couples quasiparticles to all kinds of bosonic excitations. This combination relies on a recently developed 'connector theory' that allows the use of results from the homogeneous electron gas to describe inhomogeneous materials.

Coordinator

ECOLE POLYTECHNIQUE
Net EU contribution
€ 184 707,84
Address
Route De Saclay
91128 Palaiseau Cedex
France

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Region
Ile-de-France Ile-de-France Essonne
Activity type
Higher or Secondary Education Establishments
Non-EU contribution
€ 0,00