论文标题
拉曼的反应和剪切粘度在Luttinger半含量的非Fermi液相
Raman response and shear viscosity in the non-Fermi liquid phase of Luttinger semimetals
论文作者
论文摘要
Luttinger半法定代表具有强旋轨耦合的材料，在布里渊区中心具有双层二次二次带触摸。在存在库仑相互作用的情况下，这种系统在低温和零掺杂量下表现出非Fermi液相[被称为Luttinger-Abrikosov-Beneslavskii（实验室）相]。但是，在这个日期，这种新兴状态仍然难以捉摸的明确的实验证据。因此，我们专注于将拉曼反应作为互补实验签名提取。在比温度大得多的频率下，拉曼反应表现出幂律行为，可以实验验证。另一方面，在较低的频率下，拉曼响应显示了准弹性峰。我们还计算了剪切粘度和熵密度的比率，并且获得的值是在实验室阶段出现的高标准违规的结果。
Luttinger semimetals represent materials with strong spin-orbit coupling, harbouring doubly-degenerate quadratic band touchings at the Brillouin zone center. In the presence of Coulomb interactions, such a system exhibits a non-Fermi liquid phase [dubbed as the Luttinger-Abrikosov-Beneslavskii (LAB) phase], at low temperatures and zero doping. However, a clear experimental evidence of this emergent state remains elusive to this date. Hence, we focus on extracting the Raman response as a complementary experimental signature. At frequencies much larger than the temperature, the Raman response exhibits a power-law behavior, which can be verified experimentally. On the other hand, at lower frequencies, the Raman response displays a quasi-elastic peak. We also compute the ratio of the shear viscosity and the entropy density, and the value obtained is a consequence of the hyperscaling violation that emerges in the LAB phase.
