NMR/NQR in the antiferromagnetic parent compounds of high-temperature superconductors

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• 作者：Brinkmann ; D.
• 关键词：NMR ; NQR ; High-temperature superconductors ; Antiferromagnetic phase
• 刊名：Journal of Alloys and Compounds
• 出版年：2001
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：August 9, 2001
• 卷：326
• 期：1-2
• 页码：7-14
• 文件大小：219 K

摘要

We review nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) experiments performed in La₂CuO₄, YBa₂Cu₃O₆, and Ca(Sr)CuO₂ which are the antiferromagnetic parent compounds of some high-temperature superconductors. Both antiferromagnetic and paramagnetic phases are considered. The following topics are discussed: (1) Measurement and calculation of the sublattice magnetization (and hence the magnon excitation spectrum) in these compounds and its critical behavior; (2) low energy excitations in the antiferromagnetic phase of Ca(Sr)CuO₂; (3) various crossovers in Ca(Sr)CuO₂; (4) bilayer coupling in YBa₂Cu₃O₆.