Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-03-26
J. Phys. Soc. Jpn. 70 (2001) 1460-1463
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, submitted to J. Phys. Soc. Jpn
Scientific paper
10.1143/JPSJ.70.1460
The interplay between quarter-filled and half-filled umklapp scattering has been examined by applying the renormalization group method to a one-dimensional quarter-filled electron system with dimerization, on-site (U) and nearest-neighbor (V) repulsive interactions. The phase diagram on the U-V plane is obtained at absolute zero temperature where the Mott insulator (the charge ordered insulator) is found for smaller (larger) V. By choosing the moderate parameter in the region of Mott insulator, it is shown that the resistivity exhibits a crossover from behavior of quarter-filling to that of half-filling with decreasing temperature.
Suzumura Yoshikazu
Tsuchiizu Masahisa
Yoshioka Hideo
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