Stripe formation in repulsive 4-leg Hubbard ladder: Directly-extended DMRG studies

M. Machida, S. Yamada, M. Okumura, Y. Ohashi, H. Matsumoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 × 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.

Original languageEnglish
Pages (from-to)1141-1144
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume468
Issue number15-20
DOIs
Publication statusPublished - 2008 Sep 15

Keywords

  • Density-matrix renormalization group
  • High-T superconductors
  • Hubbard model
  • Stripe

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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