activity
20032026
most citedSpectral signatures of the BCS-BEC crossover in the excitonic insulator phase of the extended Falicov-Kimball model

91 citations · 245 across the 17 of their papers we have counts for

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Showing 2013Show all

2 papers · 1 filter

cond-mat.str-el2013★ 2 cited

Linear response within the projection-based renormalization method: Many-body corrections beyond the random phase approximation

Van-Nham Phan, Klaus W. Becker, Holger Fehske

The explicit evaluation of linear response coefficients for interacting many-particle systems still poses a considerable challenge to theoreticians. In this work we use a novel man…

cond-mat.str-el2013★ 26 cited

Exciton condensation due to electron-phonon interaction

N. V. Phan, K. W. Becker, H. Fehske

We show that the coupling to vibrational degrees of freedom can drive a semimetal excitonic-insulator quantum phase transition in an one-dimensional two-band f-c electron system at…