Turbulent hydrodynamics in strongly correlated Kagome metals

被引：26

作者：

Di Sante, Domenico ^{[1
,2
]}

Erdmenger, Johanna ^{[1
,2
]}

Greiter, Martin ^{[1
,2
]}

Matthaiakakis, Ioannis ^{[1
,2
]}

Meyer, Rene ^{[1
,2
]}

Fernandez, David Rodriguez ^{[1
,2
]}

Thomale, Ronny ^{[1
,2
]}

van Loon, Erik ^{[3
]}

Wehling, Tim ^{[3
]}

机构：

[1] Julius Maximilians Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[2] Julius Maximilians Univ Wurzburg, Wurzburg Dresden Cluster Excellence Ct Qmat, D-97074 Wurzburg, Germany

[3] Univ Bremen, Inst Theoret Phys, Otto Hahn Allee 1, D-28359 Bremen, Germany

来源：

NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期

关键词：

COUPLING-CONSTANT DEPENDENCE; SHEAR VISCOSITY; ELECTRON; RESISTANCE;

D O I：

10.1038/s41467-020-17663-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A current challenge in condensed matter physics is the realization of strongly correlated, viscous electron fluids. These fluids can be described by holography, that is, by mapping them onto a weakly curved gravitational theory via gauge/gravity duality. The canonical system considered for realizations has been graphene. In this work, we show that Kagome systems with electron fillings adjusted to the Dirac nodes provide a much more compelling platform for realizations of viscous electron fluids, including non-linear effects such as turbulence. In particular, we find that in Scandium Herbertsmithite, the fine-structure constant, which measures the effective Coulomb interaction, is enhanced by a factor of about 3.2 as compared to graphene. We employ holography to estimate the ratio of the shear viscosity over the entropy density in Sc-Herbertsmithite, and find it about three times smaller than in graphene. These findings put the turbulent flow regime described by holography within the reach of experiments. Viscous electron fluids are predicted in strongly correlated systems but remain challenging to realize. Here, the authors predict enhanced effective Coulomb interaction and reduced ratio of the shear viscosity over entropy density in a Kagome metal, inferring turbulent flow of viscous electron fluids.

引用

页数：7