{"paper":{"title":"Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C$_9$H$_{18}$N$_2$CuBr$_4$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"C. P. Aoyama, F. F. Awwadi, H. D. Zhou, Huibo Cao, J. A. Rodriguez-Rivera, J. Ma, K. Coester, K. P. Schmidt, M. Matsuda, M. M. Turnbull, M. Zhu, R. Custelcean, Tao Hong, W. Tian, X. Ke, Y. Qiu, Y. Takano","submitted_at":"2014-05-26T21:39:38Z","abstract_excerpt":"We present specific-heat and neutron-scattering results for the \\emph{S}=1/2 quantum antiferromagnet (dimethylammonium)(3,5-dimethylpyridinium)CuBr$_4$. The material orders magnetically at \\emph{T}$_N$=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 $J_{\\rm leg}$=0.60(2)~meV, rung exchange $J_{\\rm rung}$=0.64(9)~meV, interladder exchange $J_{\\rm int}$=0.19(2)~meV, and an interaction-anisotropy parameter $\\lambda$=0.93(2), according to inelastic neu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6748","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}