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We theoretically describe the charge ordering (CO) metal-insulator transitionbased on a quasi-one-dimensional extended Hubbard model, and investigate thefinite temperature ($T$) properties across the transition temperature, $T_{\rmCO}$. In order to calculate $T$ dependence of physical quantities such as thespin susceptibility and the electrical resistivity, both above and below$T_{\rm CO}$, a theoretical scheme is developed which combines analyticalmethods with numerical calculations. We take advantage of the renormalizationgroup equations derived from the effective bosonized Hamiltonian, where Lanczosexact diagonalization data are chosen as initial parameters, while the CO orderparameter at finite-$T$ is determined by quantum Monte Carlo simulations. Theresults show that the spin susceptibility does not show a steep singularity at$T_{\rm CO}$, and it slightly increases compared to the case without CO becauseof the suppression of the spin velocity. In contrast, the resistivity exhibitsa sudden increase at $T_{\rm CO}$, below which a characteristic $T$ dependenceis observed. We also compare our results with experiments on molecularconductors as well as transition metal oxides showing CO.

Finite-Temperature Properties across the Charge Ordering Transition -- Combined Bosonization, Renormalization Group, and Numerical Methods