Quasiparticle spectral density of low-dimensional Hubbard Hamiltonians
- 1 January 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 29 (1) , 476-478
- https://doi.org/10.1103/physrevb.29.476
Abstract
The spectral density of states of one- and two-dimensional Hubbard Hamiltonians is analyzed by means of Green's-function techniques. The procedure has been checked in the half-filled—band one-dimensional case by comparing it with the well-known solution of Lieb and Wu. When the ratio between the intrasite Coulomb interaction and the transfer integral is great enough, we find for subbands for both the one- and two-dimensional cases. Implications for Si(111) surfaces are commented on.Keywords
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