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Title: Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4

Abstract

In this article, we present specific-heat and neutron-scattering results for the S=1/2 quantum antiferromagnet (dimethylammonium)(3,5-dimethylpyridinium)CuBr4. The material orders magnetically at TN=1.99(2) K, and magnetic excitations are accompanied by an energy gap of 0.30(2) meV due to spin anisotropy. The system is best described as coupled two-leg spin-1/2 ladders with the leg exchange Jleg=0.60(2) meV, rung exchange Jrung=0.64(9) meV, interladder exchange Jint=0.19(2) meV, and an interaction-anisotropy parameter λ=0.93(2), according to inelastic neutron-scattering measurements. In contrast to most spin ladders reported to date, the material is a rare example in which the interladder coupling is very near the critical value required to drive the system to a Néel-ordered phase without the assistance of a magnetic field.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [5];  [6];  [6];  [7];  [7];  [1];  [1];  [1];  [1];  [8];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Technische Universitat Dortmund, Dortmund (Germany)
  3. The University of Jordan, Amman (Jordan)
  4. Clark Univ., Worcester, MA (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  6. Michigan State Univ., East Lansing, MI (United States)
  7. Univ. of Florida, Gainesville, FL (United States)
  8. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265300
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 89; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hong, Tao, Schmidt, K. P., Coester, K., Awwadi, F. F., Turnbull, M. M., Qiu, Y., Rodriguez-Rivera, J. A., Zhu, M., Ke, X., Aoyama, C. P., Takano, Y., Cao, Huibo, Tian, Wei, Ma, Jie, Custelcean, Radu, Zhou, H. D., and Matsuda, Masaaki. Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.89.174432.
Hong, Tao, Schmidt, K. P., Coester, K., Awwadi, F. F., Turnbull, M. M., Qiu, Y., Rodriguez-Rivera, J. A., Zhu, M., Ke, X., Aoyama, C. P., Takano, Y., Cao, Huibo, Tian, Wei, Ma, Jie, Custelcean, Radu, Zhou, H. D., & Matsuda, Masaaki. Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4. United States. https://doi.org/10.1103/PhysRevB.89.174432
Hong, Tao, Schmidt, K. P., Coester, K., Awwadi, F. F., Turnbull, M. M., Qiu, Y., Rodriguez-Rivera, J. A., Zhu, M., Ke, X., Aoyama, C. P., Takano, Y., Cao, Huibo, Tian, Wei, Ma, Jie, Custelcean, Radu, Zhou, H. D., and Matsuda, Masaaki. 2014. "Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4". United States. https://doi.org/10.1103/PhysRevB.89.174432.
@article{osti_1265300,
title = {Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4},
author = {Hong, Tao and Schmidt, K. P. and Coester, K. and Awwadi, F. F. and Turnbull, M. M. and Qiu, Y. and Rodriguez-Rivera, J. A. and Zhu, M. and Ke, X. and Aoyama, C. P. and Takano, Y. and Cao, Huibo and Tian, Wei and Ma, Jie and Custelcean, Radu and Zhou, H. D. and Matsuda, Masaaki},
abstractNote = {In this article, we present specific-heat and neutron-scattering results for the S=1/2 quantum antiferromagnet (dimethylammonium)(3,5-dimethylpyridinium)CuBr4. The material orders magnetically at TN=1.99(2) K, and magnetic excitations are accompanied by an energy gap of 0.30(2) meV due to spin anisotropy. The system is best described as coupled two-leg spin-1/2 ladders with the leg exchange Jleg=0.60(2) meV, rung exchange Jrung=0.64(9) meV, interladder exchange Jint=0.19(2) meV, and an interaction-anisotropy parameter λ=0.93(2), according to inelastic neutron-scattering measurements. In contrast to most spin ladders reported to date, the material is a rare example in which the interladder coupling is very near the critical value required to drive the system to a Néel-ordered phase without the assistance of a magnetic field.},
doi = {10.1103/PhysRevB.89.174432},
url = {https://www.osti.gov/biblio/1265300}, journal = {Physical Review B},
issn = {2469-9950},
number = 17,
volume = 89,
place = {United States},
year = {Fri May 30 00:00:00 EDT 2014},
month = {Fri May 30 00:00:00 EDT 2014}
}

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