Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4

Tao Hong; K. P. Schmidt; K. Coester; F. F. Awwadi; M. M. Turnbull; Y. Qiu; J. A. Rodriguez-Rivera; M. Zhu; X. Ke; C. P. Aoyama; Y. Takano; Huibo Cao; W. Tian; J. Ma; R. Custelcean; H. D. Zhou; M. Matsuda

doi:10.1103/PhysRevB.89.174432

Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4

Tao Hong, K. P. Schmidt, K. Coester, F. F. Awwadi, M. M. Turnbull, Y. Qiu, J. A. Rodriguez-Rivera, M. Zhu, X. Ke, C. P. Aoyama, Y. Takano, Huibo Cao, W. Tian, J. Ma, R. Custelcean, H. D. Zhou, M. Matsuda

Chemical Separations Group

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Abstract

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 Î=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.

Original language	English
Article number	174432
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.89.174432
State	Published - May 30 2014

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Hong, T., 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, H., Tian, W., Ma, J., Custelcean, R., Zhou, H. D., & Matsuda, M. (2014). Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4. Physical Review B - Condensed Matter and Materials Physics, 89(17), Article 174432. https://doi.org/10.1103/PhysRevB.89.174432

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title = "Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4",

abstract = "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 {\^I}=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 N{\'e}el-ordered phase without the assistance of a magnetic field.",

author = "Tao Hong and Schmidt, {K. P.} and K. Coester and Awwadi, {F. F.} and Turnbull, {M. M.} and Y. Qiu and Rodriguez-Rivera, {J. A.} and M. Zhu and X. Ke and Aoyama, {C. P.} and Y. Takano and Huibo Cao and W. Tian and J. Ma and R. Custelcean and Zhou, {H. D.} and M. Matsuda",

year = "2014",

month = may,

day = "30",

doi = "10.1103/PhysRevB.89.174432",

language = "English",

volume = "89",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "17",

}

Hong, T, Schmidt, KP, Coester, K, Awwadi, FF, Turnbull, MM, Qiu, Y, Rodriguez-Rivera, JA, Zhu, M, Ke, X, Aoyama, CP, Takano, Y, Cao, H , Tian, W, Ma, J, Custelcean, R, Zhou, HD & Matsuda, M 2014, 'Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4', Physical Review B - Condensed Matter and Materials Physics, vol. 89, no. 17, 174432. https://doi.org/10.1103/PhysRevB.89.174432

TY - JOUR

T1 - Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4

AU - Hong, Tao

AU - Schmidt, K. P.

AU - Coester, K.

AU - Awwadi, F. F.

AU - Turnbull, M. M.

AU - Qiu, Y.

AU - Rodriguez-Rivera, J. A.

AU - Zhu, M.

AU - Ke, X.

AU - Aoyama, C. P.

AU - Takano, Y.

AU - Cao, Huibo

AU - Tian, W.

AU - Ma, J.

AU - Custelcean, R.

AU - Zhou, H. D.

AU - Matsuda, M.

PY - 2014/5/30

Y1 - 2014/5/30

N2 - 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 Î=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.

AB - 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 Î=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.

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U2 - 10.1103/PhysRevB.89.174432

DO - 10.1103/PhysRevB.89.174432

M3 - Article

AN - SCOPUS:84902197194

SN - 1098-0121

VL - 89

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 17

M1 - 174432

ER -

Magnetic ordering induced by interladder coupling in the spin- 12 Heisenberg two-leg ladder antiferromagnet C9 H18 N2 CuBr4

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