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arXiv 2106.08588cond-mat.mes-hall
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Kane费米子中的反常输运

Anomalous transport in Kane fermions

Karun Gadge, Sumanta Tewari, Gargee Sharma

AI总结:

本文研究了在弱Zeeman场下Kane费米子的Berry曲率及反常输运系数,并分析了实验可探测的各向异性响应。

摘要:

Kane费米子的特征是线性的Dirac锥与平带相交,类似于赝自旋1的Dirac半金属。与相对论性Dirac费米子类似,Kane费米子满足线性的能量-动量关系,可归类为赝相对论性的。尽管不受对称性或拓扑保护,Kane费米子可通过合适的能带工程出现,例如在碲化汞化合物中。在此,我们研究了在破坏时间反演对称性的弱Zeeman场存在时出现的Kane费米子的Berry曲率。我们讨论了相关的反常输运系数,并讨论了这些响应中可在实验中探测的各向异性。

英文摘要:

Kane fermions are characterized by a linear Dirac cone intersecting with a flat band, resembling a pseudo-spin-1 Dirac semimetal. Similar to relativistic Dirac fermions, Kane fermions satisfy a linear energy-momentum relation and can be classified as being pseudo-relativistic. Though not protected by symmetry or by topology, Kane fermions can emerge by suitable band engineering, for example, in mercury-telluride compounds. Here we study the Berry curvature of Kane fermions that emerges in the presence of time-reversal symmetry breaking weak Zeeman fields. We discuss the related anomalous transport coefficients and discuss the anisotropy in these responses that can be probed in experiments.

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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