摘要翻译:
本文研究了低空穴密度下具有最近邻跳变积分的各种晶格上无限u$排斥Hubbard模型的动力学磁性。将$\phi$从0调谐到$\pi$使基态(GS)在临界$\phi_c$处从长冈型铁磁态转变为Haerter-Shastry型反铁磁态,这两个态都是动力学起源。板内自旋关联,以及GS能量,信号这样一个量子临界。这种可调谐的动力学磁性是一般的,并出现在以正方形或三角形为基本成分的链、梯和二维格子中。
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英文标题:
《Tuning Kinetic Magnetism of Strongly Correlated Electrons via Staggered
Flux》
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作者:
Yi-Fei Wang, Chang-De Gong, and Z. D. Wang
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
We explore the kinetic magnetism of the infinite-$U$ repulsive Hubbard models at low hole densities on various lattices with nearest-neighbor hopping integrals modulated by a staggered magnetic flux $\pm\phi$. Tuning $\phi$ from 0 to $\pi$ makes the ground state (GS) change from a Nagaoka-type ferromagnetic state to a Haerter-Shastry-type antiferromagnetic state at a critical $\phi_c$, with both states being of kinetic origin. Intra-plaquette spin correlation, as well as the GS energy, signals such a quantum criticality. This tunable kinetic magnetism is generic, and appears in chains, ladders and two-dimensional lattices with squares or triangles as elementary constituents.
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PDF链接:
https://arxiv.org/pdf/706.4423