Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1410.8077 · Physica B Condensed Matter

The effect of FM inter-ladder coupling in spin-1/2 AFM two-leg ladders in the presence of a magnetic field: Quantum Monte Carlo study

J. Jahangiri, H. Hadipour, S. Mahdavifar, S. Farjami Shayesteh

Published Nov 29, 2014• 3 citations
arXivHTMLPDF
DOI
10.1016/j.physb.2014.11.099

Related papers

First-order commensurate–incommensurate magnetic phase transition in the coupled FM spin-1/2 two-leg ladders

J. Jahangiri, H. Hadipour, S. Mahdavifar +1 more

arXiv:1507.04954•Physica B Condensed Matter•Jul 14, 2015•2 citations

Impact of inter-ladder coupling in a coupled spin-1/2 two-leg ladder

Tao Hong, K.P. Schmidt, K. Coester +13 more

Bulletin of the American Physical Society•Mar 3, 2014•0 citations

Quantum Monte Carlo Studies on Attractive Hubbard Model with Anisotropic Spin-dependent Hopping on Two-leg Ladder Lattice

Ho Kin Tang, Zhongbing Huang, Jin Sun +1 more

Bulletin of the American Physical Society•Feb 27, 2012•0 citations

Quantum Monte Carlo simulation for magnetic properties in spin systems in chain and ladders: Magnetic Raman spectra by the exchange scattering in the antiferromagnetic ladder with two-legs

Toshihiko Suzuki, Yuhei Natsume, 鈴木 敏彦 +1 more

•Jan 1, 1999•0 citations

Magnetic-Field-Driven Dimensional Reduction in a Quantum Antiferromagnet

Subhankar Khatua, Marcin Raczkowski, Jeroen van den Brink +1 more

Low dimensionality enhances quantum fluctuations, triggering novel states of quantum matter to emerge. In real materials, low dimensionality usually arises from spatially strongly anisotropic couplings. Here, we demonstrate a different mechanism: in two-dimensional systems with coupled alternating ferromagnetic (FM) and antiferromagnetic (AFM) spin-$1/2$ chains, an applied magnetic field may drive a dimensional reduction. Under magnetic field, the FM chains polarize and stiffen, suppressing the propagation of transverse AFM fluctuations from one chain to another, and effectively induce one-dimensional behavior at low energies. For a model describing botallackite, Cu$_2$(OH)$_3$Br, quantum Monte Carlo dynamics show that beyond a critical magnetic field, the low-energy spectrum reduces to that of a one-dimensional AFM Heisenberg spin-$1/2$ chain with field-dependent incommensurate two-spinon fluctuations, providing clear signatures for inelastic neutron scattering.

arXiv:2608.04096•Aug 4, 2026•0 citations

Quantum Monte Carlo simulations for stacked spin-ladder systems containing low concentrations of nonmagnetic impurities: Application to the low-temperature broadening of NMR spectra in SrCu 2 O 3

Robert Achleitner, Hans Gerd Evertz, Masatoshi Imada +2 more

We present a quantum Monte Carlo study for Heisenberg spin-$\frac{1}{2}$ two-leg ladder systems doped with nonmagnetic impurities. The simulations are applied to the doped spin-ladder compound Sr(Cu${}_{1\ensuremath{-}x}$Zn${}_{x}$)${}_{2}$O${}_{3}$, where a large broadening of the ${}^{65}$Cu NMR lines has been observed in experiment at low temperatures but far above the N\'eel temperature. We find that interladder couplings with a sizable coupling in the stacking direction are required to describe the line broadening, which cannot be explained by considering a single ladder only. Around a single impurity, spin correlations cause an exponentially decaying antiferromagnetic local magnetization in a magnetic field. We develop an effective model for the local magnetization of systems with many randomly distributed impurities, with few parameters which can be extracted out of quantum Monte Carlo calculations with a single impurity. The broadening arises from a drag effect, where the magnetization around an impurity works as an effective field for spins on the neighboring ladders, causing a nonexponentially decaying magnetization cloud around the impurity. Our results show that even for impurity concentrations as small as $x=0.001$ and $x=0.0025$, the broadening effect is large, in good quantitative agreement with experiment. We also develop a simple model for the effective interaction of two impurity spins.

arXiv:1310.1697•Physical Review B•Dec 23, 2013•3 citations
Low dimensionality enhances quantum fluctuations, triggering novel states of quantum matter to emerge. In real materials, low dimensionality usually arises from spatially strongly anisotropic couplings. Here, we demonstrate a different mechanism: in two-dimensional systems with coupled alternating ferromagnetic (FM) and antiferromagnetic (AFM) spin-1/21/21/2 chains, an applied magnetic field may drive a dimensional reduction. Under magnetic field, the FM chains polarize and stiffen, suppressing the propagation of transverse AFM fluctuations from one chain to another, and effectively induce one-dimensional behavior at low energies. For a model describing botallackite, Cu2_22​(OH)3_33​Br, quantum Monte Carlo dynamics show that beyond a critical magnetic field, the low-energy spectrum reduces to that of a one-dimensional AFM Heisenberg spin-1/21/21/2 chain with field-dependent incommensurate two-spinon fluctuations, providing clear signatures for inelastic neutron scattering.
We present a quantum Monte Carlo study for Heisenberg spin-12\frac{1}{2}21​ two-leg ladder systems doped with nonmagnetic impurities. The simulations are applied to the doped spin-ladder compound Sr(Cu${}_{1\ensuremath{-}x}$Znx{}_{x}x​)2{}_{2}2​O3{}_{3}3​, where a large broadening of the 65{}^{65}65Cu NMR lines has been observed in experiment at low temperatures but far above the N\'eel temperature. We find that interladder couplings with a sizable coupling in the stacking direction are required to describe the line broadening, which cannot be explained by considering a single ladder only. Around a single impurity, spin correlations cause an exponentially decaying antiferromagnetic local magnetization in a magnetic field. We develop an effective model for the local magnetization of systems with many randomly distributed impurities, with few parameters which can be extracted out of quantum Monte Carlo calculations with a single impurity. The broadening arises from a drag effect, where the magnetization around an impurity works as an effective field for spins on the neighboring ladders, causing a nonexponentially decaying magnetization cloud around the impurity. Our results show that even for impurity concentrations as small as x=0.001x=0.001x=0.001 and x=0.0025x=0.0025x=0.0025, the broadening effect is large, in good quantitative agreement with experiment. We also develop a simple model for the effective interaction of two impurity spins.