Electronic States in Half-Filled Correlated System with Alternating Potential

Details Electronic States in Half-Filled Correlated System with Alternating Potential Electronic States in Half-Filled Correlated System with Alternating Potential

1999-10-08

arxiv.org/abs/cond-mat/9910133v1

J. Phys. Soc. Jpn. 68 (1999) 3966-3974

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, 4 figures, to be published in J. Phys. Soc. Jpn. 68 (1999) No. 12

Scientific paper

10.1143/JPSJ.68.3966

The effect of an alternating potential on a one-dimensional half-filled Hubbard model with repulsive interaction has been examined by applying the renormalization group method to the bosonized Hamiltonian. The electronic state, which is determined by the competition between alternating potential and umklapp scattering, is calculated where the relevance and the irrelevance of the alternating potential leads to the band insulator and the Mott insulator respectively. The excitation gaps for charge and spin fluctuations are calculated for both states.

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