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Title: Quantum Monte Carlo study of weakly coupled spin ladders

Abstract

We report a quantum Monte Carlo study of the thermodynamic properties of arrays of spin ladders with various widths (n), coupled via a weak interladder exchange coupling {alpha}J, where {ital J} is the intraladder coupling both along and between the chains. This coupled ladder system serves as a simplified model for the magnetism of presumed ordered spin and charge stripes in the two-dimensional CuO{sub 2} planes of hole-doped copper oxides. Our results for n=3 with weak interladder coupling {alpha}=0.05, estimated from the t-t{sup {prime}}-t{sup {double_prime}}-J model, show good agreement with the ordering temperature of the recently observed spin-density-wave condensation in La{sub 2}CuO{sub 4+y}. We show that there exists a quantum critical point at {alpha}{sub c}{approx_equal}0.07 for n=4, and determine the phase diagram. Our data at this quantum critical point agree quantitatively with the universal scaling predicted by the quantum nonlinear {sigma} model. We also report results on random mixtures of n=2 and n=3 ladders, which correspond to the doping region near but above 1/8. Our study of the magnetic static structure factor reveals a saturation of the incommensurability of the spin correlations around 1/8, while the incommensurability of the charge stripes grows linearly with hole concentration. The implications of thismore » result for the interpretation of neutron-scattering experiments on the dynamic spin fluctuations in La{sub 2{minus}x}Sr{sub x}CuO{sub 4} are discussed. {copyright} {ital 1999} {ital The American Physical Society}« less

Authors:
 [1]; ; ;  [2];  [3];  [4];  [5]
  1. Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)
  2. Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  3. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  4. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  5. Institute for Chemical Research, Kyoto University, Gokasho, Uji 610-0011 (Japan)
Publication Date:
OSTI Identifier:
357301
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60; Journal Issue: 5; Other Information: PBD: Aug 1999
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; THERMODYNAMICS; SPIN; MONTE CARLO METHOD; QUANTUM MECHANICS; COPPER OXIDES; LANTHANUM OXIDES; SPIN WAVES; HIGH-TC SUPERCONDUCTORS; EXCHANGE INTERACTIONS; ELECTRON EXCHANGE; FLUCTUATIONS

Citation Formats

Kim, Y J, Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Birgeneau, R J, Kastner, M A, Lee, Y S, Endoh, Y, Shirane, G, and Yamada, K. Quantum Monte Carlo study of weakly coupled spin ladders. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.3294.
Kim, Y J, Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Birgeneau, R J, Kastner, M A, Lee, Y S, Endoh, Y, Shirane, G, & Yamada, K. Quantum Monte Carlo study of weakly coupled spin ladders. United States. https://doi.org/10.1103/PhysRevB.60.3294
Kim, Y J, Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Birgeneau, R J, Kastner, M A, Lee, Y S, Endoh, Y, Shirane, G, and Yamada, K. Sun . "Quantum Monte Carlo study of weakly coupled spin ladders". United States. https://doi.org/10.1103/PhysRevB.60.3294.
@article{osti_357301,
title = {Quantum Monte Carlo study of weakly coupled spin ladders},
author = {Kim, Y J and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 and Birgeneau, R J and Kastner, M A and Lee, Y S and Endoh, Y and Shirane, G and Yamada, K},
abstractNote = {We report a quantum Monte Carlo study of the thermodynamic properties of arrays of spin ladders with various widths (n), coupled via a weak interladder exchange coupling {alpha}J, where {ital J} is the intraladder coupling both along and between the chains. This coupled ladder system serves as a simplified model for the magnetism of presumed ordered spin and charge stripes in the two-dimensional CuO{sub 2} planes of hole-doped copper oxides. Our results for n=3 with weak interladder coupling {alpha}=0.05, estimated from the t-t{sup {prime}}-t{sup {double_prime}}-J model, show good agreement with the ordering temperature of the recently observed spin-density-wave condensation in La{sub 2}CuO{sub 4+y}. We show that there exists a quantum critical point at {alpha}{sub c}{approx_equal}0.07 for n=4, and determine the phase diagram. Our data at this quantum critical point agree quantitatively with the universal scaling predicted by the quantum nonlinear {sigma} model. We also report results on random mixtures of n=2 and n=3 ladders, which correspond to the doping region near but above 1/8. Our study of the magnetic static structure factor reveals a saturation of the incommensurability of the spin correlations around 1/8, while the incommensurability of the charge stripes grows linearly with hole concentration. The implications of this result for the interpretation of neutron-scattering experiments on the dynamic spin fluctuations in La{sub 2{minus}x}Sr{sub x}CuO{sub 4} are discussed. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.60.3294},
url = {https://www.osti.gov/biblio/357301}, journal = {Physical Review, B: Condensed Matter},
number = 5,
volume = 60,
place = {United States},
year = {1999},
month = {8}
}