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arXiv 1502.02695cond-mat.str-el
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双Weyl半金属中的关联效应

Correlation effects in double-Weyl semimetals

Hsin-Hua Lai

摘要:

研究了在铁磁相的三维半金属HgCr $_2$ Se $_4$中可能实现的双Weyl费米子系统的长程库仑相互作用效应.在单圈重整化群分析中,我们发现存在一个稳定的不动点,在该不动点处库仑相互作用被各向异性屏蔽。在稳定的固定点,重整化库仑相互作用诱导对数校正的物理量,如比热,压缩性,抗磁磁化率,和有限的频率(动态)电导率,利用RG方程附近的稳定固定点。

英文摘要:

We study the long-range Coulomb interaction effects on the double-Weyl fermion system which is possibly realized in the three dimensional semimetal HgCr$_2$Se$_4$ in the ferromagnetic phase. Within the one-loop renormalization group analysis, we find that there exists a stable fixed point at which the Coulomb interaction is screened anisotropically. At the stable fixed point, the renormalized Coulomb interaction induces logarithmic corrections to the physical quantities such as specific heat, compressibility, diamagnetic susceptibility, and the finite frequency (dynamic) conductivity that are obtained utilizing RG equations near the stable fixed point.

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