TY  - JOUR
AU  - Liebsch, A.
TI  - Correlated Dirac fermions on the honeycomb lattice studied within cluster dynamical mean field theory
JO  - Physical review / B
VL  - 83
IS  - 3
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-18487
SP  - 035113
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - The role of nonlocal Coulomb correlations in the honeycomb lattice is investigated within cluster dynamical mean field theory combined with finite-temperature exact diagonalization. The paramagnetic semimetal-to-insulator transition is found to be in excellent agreement with finite-size determinantal quantum Monte Carlo simulations and with cluster dynamical mean field calculations based on the continuous-time quantum Monte Carlo approach. As expected, the critical Coulomb energy is much lower than within a local or single-site formulation. Short-range correlations are shown to give rise to a pseudogap and concomitant non-Fermi-liquid behavior within a narrow range below the Mott transition.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000286767800001
DO  - DOI:10.1103/PhysRevB.83.035113
UR  - https://juser.fz-juelich.de/record/18487
ER  -