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

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

doi:10.1016/j.physc.2008.05.269

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

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

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-T_c superconductors.

Original language	English
Pages (from-to)	1141-1144
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2008.05.269
Publication status	Published - 2008 Sept 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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10.1016/j.physc.2008.05.269

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title = "Stripe formation in repulsive 4-leg Hubbard ladder: Directly-extended DMRG studies",

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.",

keywords = "Density-matrix renormalization group, High-T superconductors, Hubbard model, Stripe",

author = "M. Machida and S. Yamada and M. Okumura and Y. Ohashi and H. Matsumoto",

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T1 - Stripe formation in repulsive 4-leg Hubbard ladder

T2 - Directly-extended DMRG studies

AU - Machida, M.

AU - Yamada, S.

AU - Okumura, M.

AU - Ohashi, Y.

AU - Matsumoto, H.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - 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.

AB - 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.

KW - Density-matrix renormalization group

KW - High-T superconductors

KW - Hubbard model

KW - Stripe

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JO - Physica C: Superconductivity and its applications

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

Abstract

Keywords

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