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arXiv 1301.3564cond-mat.str-el
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镜像对称性破缺多轨道带中的p波近藤耦合

Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking

Jun Won Rhim, Jung Hoon Han

摘要:

研究了周期性Anderson模型中的近藤效应,该模型的导带具有多轨道特性,并受到外加的镜像对称破缺场的影响。采用基于p轨道的玩具模型进行分析,我们发现即使在微观哈密顿量中只假设近藤杂化,p波特征的近藤配对对称性在参数空间和填充因子的某些区域也自洽地出现.由于p波近藤耦合,近藤杂化相的能带结构变为双对称。在多层膜环境中,如最近成功生长的重费米子系统,在光谱或输运测量中应该很容易观察到对称性的降低。

英文摘要:

We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally. Taking p-orbital-based toy model for analysis, we find the Kondo pairing symmetry of p-wave character emerges self-consistently over some regions of parameter space and filling factor even though only the on-site Kondo hybridization is assumed in the microscopic Hamiltonian. The band structure in the Kondo-hybridized phase becomes nematic, with only two-fold symmetry, due to the p-wave Kondo coupling. The reduced symmetry should be readily observable in spectroscopic or transport measurements for heavy fermion system in a multilayer environment such as successfully grown recently.

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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