Luttinger liquid versus charge density wave behaviour in the onedimensional spinless fermion Holstein model
Abstract
We discuss the nature of the different ground states of the halffilled Holstein model of spinless fermions in 1D. In the metallic regime we determine the renormalised effective coupling constant and the velocity of the charge excitations by a densitymatrix renormalisation group (DMRG) finitesize scaling approach. At low (high) phonon frequencies the Luttinger liquid is characterised by an attractive (repulsive) effective interaction. In the chargedensity wave Peierlsdistorted state the charge structure factor scales to a finite value indicating longrange order.
 Publication:

Physica B Condensed Matter
 Pub Date:
 April 2005
 DOI:
 10.1016/j.physb.2005.01.198
 arXiv:
 arXiv:condmat/0406023
 Bibcode:
 2005PhyB..359..699F
 Keywords:

 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 2 pages, 3 figures, submitted to SCES'04