Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819487 | Physica C: Superconductivity and its Applications | 2008 | 4 Pages |
Abstract
In order to study the ground state of the Hubbard model from a slightly doped region to an over-doped one, we directly apply the density renormalization group method to 4-leg Ã 20-ladder repulsive Hubbard model and calculate hole distribution profiles with changing the on-site repulsion U/t from 0 to 15 and the doping ratio from 0.025 to 0.250. The calculation results in the underdoped range reveal that various stripe structures formed by doped holes merge or separate depending on U/t and the doping ratio. We suggest that these rich features are relevant to modulated hole distributions as experimentally observed in underdoped high-Tc superconductors.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M. Machida, S. Yamada, M. Okumura, Y. Ohashi, H. Matsumoto,