37 citations · 210 across the 16 of their papers we have counts for
12 papers · 1 filter
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…
Phase separation in the Edwards model
S. Ejima, S. Sykora, K. W. Becker +1
The nature of charge transport within a correlated background medium can be described by spinless fermions coupled to bosons in the model introduced by Edwards. Combining numerical…
Excitonic resonances in the 2D extended Falicov-Kimball model
Van-Nham Phan, Holger Fehske, Klaus W. Becker
Using the projector-based renormalization method we investigate the formation of the excitonic insulator phase in the two-dimensional (2D) spinless Falicov-Kimball model with dispe…
Charge-density-wave formation in a half-filled fermion-boson transport model: A projective renormalization approach
S. Sykora, K. W. Becker, H. Fehske
We study the metal-insulator transition in a very general two-channel transport model, where charge carriers are coupled to a correlated background medium. The fluctuations of the…
Relationship between the thermopower and entropy of strongly correlated electron systems
V. Zlatic, R. Monnier, J. Freericks +1
A number of recent experiments report the low-temperature thermopower and specific heat coefficients of strongly correlated electron systems. Describing the charge an…
Charge excitations in LiVO and NaVO: similarities and differences
A. Huebsch, C. Waidacher, K. W. Becker
We calculate the optical conductivity of LiVO and NaVO using exact numerical diagonalization of a quarter-filled extended Hubbard model on a system of coupl…