Séminaire du LPTMS: Eoin Quinn *** séminaire exceptionnel ***

Quand

07/06/2018    
11:00 - 12:00

LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay
15 Rue Georges Clemenceau, Orsay, 91405
Chargement de la carte…

Splitting of electrons and violation of the Luttinger sum rule

Eoin Quinn (University of Amsterdam, The Netherlands)

We present a framework for organising the correlations of interacting electrons, which allows us to describe a regime of strongly correlated behaviour. We highlight two ways to characterise the electronic degree of freedom, either by the canonical fermion algebra or by the graded Lie algebra su(2|2). The first underlies the Fermi liquid description of correlated matter, and we identify a novel regime governed by the latter. We derive a systematic expansion of the electronic correlations, and compute the electronic spectral function at the leading order. This reveals a splitting in two of the electronic band, a violation of the Luttinger sum rule, and a Mott metal-insulator transition.

Réf:

Retour en haut