Phys. Rev. B 67, 205109 (2003) [4 pages]Inducement of bond-order wave due to electron correlation in one dimensionReceived 26 November 2002; revised 9 January 2003; published 28 May 2003 Density-matrix renormalization-group methods are used to investigate the quantum phase transitions in a Hubbard chain with an alternating on-site energy Δ at half filling. Our results support the existence of a bond-order wave phase, which separates the band insulator from the Mott insulator even in the absence of electron-phonon coupling. The critical points are determined accurately at fixed staggered potentials. Our results indicate a slightly smaller size of the bond-order wave phase than that of previous results. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.205109
DOI:
10.1103/PhysRevB.67.205109
PACS:
71.30.+h, 71.10.Fd, 71.10.Pm
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