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arXiv 2008.13320cond-mat.mes-hallhep-th
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相对论和非相对论系统中的手征涡旋效应

Chiral vortical effect in relativistic and nonrelativistic systems

Atsuo Shitade, Kazuya Mameda, Tomoya Hayata

摘要:

利用波包动力学的半经典理论,推导了手征涡效应及其推广形式--广义涡效应。我们考虑了自旋-涡度耦合,通过从Noether定域中减去磁化强度来计算输运电荷流。我们发现,在相对论手征费米子中,CVE中的输运电荷流总是为零。这一结果意味着,它不能在凝聚态系统,如狄拉克/外尔半金属与伪洛仑兹对称的输运实验中观察到。我们还证明了各向异性的CVE可以观察到的非相对论系统,属于点群$D_n, C_n (n = 2, 3, 4, 6)$,和$C_1$,如$n$型碲。

英文摘要:

We formulate the chiral vortical effect (CVE) and its generalization called generalized vortical effect using the semiclassical theory of wave packet dynamics. We take the spin-vorticity coupling into account and calculate the transport charge current by subtracting the magnetization one from the Noether local one. We find that the transport charge current in the CVE always vanishes in relativistic chiral fermions. This result implies that it cannot be observed in transport experiments in condensed matter systems such as Dirac/Weyl semimetals with the pseudo-Lorentz symmetry. We also demonstrate that the anisotropic CVE can be observed in nonrelativistic systems that belong to the point groups $D_n, C_n (n = 2, 3, 4, 6)$, and $C_1$, such as $n$-type tellurium.

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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