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arXiv 0905.1075cond-mat.str-el
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晶格缺陷和链间耦合对自旋1/2链化合物临界性质的影响

Consequences of lattice imperfections and interchain couplings for the critical properties of spin-1/2 chain compounds

J. Sirker

摘要:

为了将自旋链的理论预测与实验数据进行比较,通常重要的是要考虑杂质效应以及链间耦合。在这里,我们提出了有限温度下有限自旋链的场论,并计算了实验可测量的量,如磁化率和核磁共振谱。对于链间耦合,我们集中在几何形状的铜酸盐自旋链,如Sr $_2$ CuO $_3$和SrCuO $_2$。场的理论结果进行了比较,实验以及密度矩阵重整化群得到的数值数据。

英文摘要:

To allow for a comparison of theoretical predictions for spin chains with experimental data, it is often important to take impurity effects as well as interchain couplings into account. Here we present the field theory for finite spin chains at finite temperature and calculate experimentally measurable quantities like susceptibilities and nuclear magnetic resonance spectra. For the interchain couplings we concentrate on geometries relevant for cuprate spin chains like Sr$_2$CuO$_3$ and SrCuO$_2$. The field theoretical results are compared to experimental as well as numerical data obtained by the density matrix renormalization group.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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