%0 Journal Article
%A Chen, Chuang
%A Xu, Xiao Yan
%A Meng, Zi Yang
%A Hohenadler, Martin
%T Charge-Density-Wave Transitions of Dirac Fermions Coupled to Phonons
%J Physical review letters
%V 122
%N 7
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2020-03850
%P 077601
%D 2019
%X The spontaneous generation of charge-density-wave order in a Dirac fermion system via the natural mechanism of electron-phonon coupling is studied in the framework of the Holstein model on the honeycomb lattice. Using two independent and unbiased quantum Monte Carlo methods, the phase diagram as a function of temperature and coupling strength is determined. It features a quantum critical point as well as a line of thermal critical points. Finite-size scaling appears consistent with fermionic Gross-Neveu-Ising universality for the quantum phase transition and bosonic Ising universality for the thermal phase transition. The critical temperature has a maximum at intermediate couplings. Our findings motivate experimental efforts to identify or engineer Dirac systems with sufficiently strong and tunable electron-phonon coupling.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1103/PhysRevLett.122.077601
%U https://juser.fz-juelich.de/record/885467