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首页> 外文期刊>Physical review >CaCu_2(SeO_3)2Cl_2: Spin-1/2 Heisenberg chain compound with complex frustrated interchain couplings
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CaCu_2(SeO_3)2Cl_2: Spin-1/2 Heisenberg chain compound with complex frustrated interchain couplings

机译:CaCu_2(SeO_3)2Cl_2:具有复杂受阻链间偶联的Spin-1 / 2 Heisenberg链化合物

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摘要

We report the crystal structure, magnetization measurements, and band-structure calculations for the spin-1/2 quantum magnet CaCu_2(SeO_3)_2Cl_2. The magnetic behavior of this compound is well reproduced by a uniform spin-1/2 chain model with the nearest-neighbor exchange of about 133 K. Due to the peculiar crystal structure, spin chains run in the direction almost perpendicular to the structural chains. We find an exotic regime of frustrated interchain couplings owing to two inequivalent exchanges of 10 K each. Peculiar superexchange paths grant an opportunity to investigate bond-randomness effects under partial Cl-Br substitution.
机译:我们报告自旋1/2量子磁体CaCu_2(SeO_3)_2Cl_2的晶体结构,磁化强度测量和能带结构计算。该化合物的磁行为通过均匀的自旋1/2链模型得到了很好的再现,最近邻交换约为133K。由于特殊的晶体结构,自旋链几乎垂直于结构链的方向延伸。由于两个10 K的不等价交换,我们发现了一个令人沮丧的链间耦合异国情调。特殊的超交换路径为研究部分Cl-Br取代下的键-随机效应提供了机会。

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