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We investigate the thermodynamics of a one-dimensional Hubbard model withbond-charge interaction X using the transfer matrix renormalization groupmethod (TMRG). Numerical results for various quantities like spin and chargesusceptibilities, particle densities, specific heat and thermal correlationlengths are presented and discussed. We compare our data also to results forthe exactly solvable case X/t=1 as well as to bosonisation results for weakcoupling X/t << 1, which shows excellent agreement. We confirm the existence ofa Tomonaga-Luttinger and a Luther-Emery liquid phase, in agreement withprevious studies at zero temperature. Thermal singlet-pair correlation lengthsare shown to dominate density and spin correlations for finite temperatures incertain parameter regimes.Comment: 13 pages, revte

Thermodynamic properties and thermal correlation lengths of a Hubbard model with bond-charge interaction