摘要翻译:
我们认为量子三晶点(QTCP)所表现的一级跃迁的接近性解释了YBrH2Si2的非费米液体性质。这里,在QTCP下,连续相变在零温度下变成一级相变。YbRh2Si2的非费米液体行为在两个方面令人困惑;反铁磁跃迁中的发散铁磁化率和热力学量中非常规幂律依赖关系。这些难题由我们的自旋涨落理论导出的非传统临界性解决了。
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英文标题:
《YbRh2Si2: Quantum tricritical behavior in itinerant electron systems》
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作者:
Takahiro Misawa, Youhei Yamaji, and Masatoshi Imada
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最新提交年份:
2008
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分类信息:
一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
We propose that proximity of the first-order transition manifested by the quantum tricritical point (QTCP) explains non-Fermi-liquid properties of YbRh2Si2. Here, at the QTCP, a continuous phase transition changes into first order at zero temperature. The non-Fermi-liquid behaviors of YbRh2Si2 are puzzling in two aspects; diverging ferromagnetic susceptibility at the antiferromagnetic transition and unconventional power-law dependence in thermodynamic quantities. These puzzles are solved by an unconventional criticality derived from our spin fluctuation theory for the QTCP.
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PDF链接:
https://arxiv.org/pdf/710.326