Hydrodynamic transport in the Luttinger-Abrikosov-Beneslavskii non-Fermi liquid

Hydrodynamic transport in the Luttinger-Abrikosov-Beneslavskii non-Fermi liquid
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Luttinger-Abrikosov-Beneslavskii 非费米液体中的流体动力输运

DOI:
10.1103/physrevb.101.125128
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发表时间:
2020
期刊:
影响因子:
3.7
通讯作者:
I. F. Herbut
I. F. Herbut
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
J. M. Link;I. F. Herbut

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我们确定了相互作用的三维Luttinger半金属的剪切粘度和直流电导率,这些Luttinger半金属的能谱上有一个二次带接触点。众所周知,当化学势正好位于能带接触点时,长程库仑相互作用会导致Luttinger-Abrikosov-Beneslaff skii(LAB)相,这是一种相互作用的,标度不变的,非费米液体的电子状态。将重整化群(RG)分析与玻耳兹曼动力学方程相结合,确定了在RG流相互作用的实验室不动点上系统的普遍粘性/熵比和电导。库仑相互作用在系统本征态上的投影对碰撞积分中的散射幅度起着重要的定量作用,而所谓的俄歇过程对输运量中的逆散射时间有很大的数值贡献。得到的前序结果表明,当外推到物理三维空间时,粘性与熵的普适比高于Kovtun-Son-Starinets下界,但可能相当接近。
We determine the shear viscosity and the dc electrical conductivity of interacting three-dimensional Luttinger semimetals, which have a quadratic band touching point in the energy spectrum, in the hydrodynamic regime. It is well known that when the chemical potential is right at the band touching point, the long-range Coulomb interaction induces the Luttinger-Abrikosov-Beneslavskii (LAB) phase at, which is an interacting, scale-invariant, non-Fermi-liquid state of electrons. Upon combining the renormalization-group (RG) analysis near the upper critical spatial dimension of 4 with the Boltzmann kinetic equation, we determine the universal ratio of viscosity over entropy and the electrical dc conductivity of the system at the interacting LAB fixed point of the RG flow. The projection of the Coulomb interaction on the eigenstates of the system is found to play an important quantitative role for the scattering amplitude in the collision integral, and the so-called Auger processes make a large numerical contribution to the inverse scattering time in the transport quantities. The obtained leading-order result suggests that the universal ratio of the viscosity over entropy, when extrapolated to the physical three spatial dimensions, is above, but could be rather close to, the Kovtun-Son-Starinets lower bound.
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DOI: --
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影响因子: 8.6
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发表时间: 2018-05-10
影响因子: 8.6
作者:
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发表时间: 2018
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影响因子: 3.7
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