Thermal and electrical signatures of a hydrodynamic electron fluid in tungsten diphosphide.
Thermal and electrical signatures of a hydrodynamic electron fluid in tungsten diphosphide.
复制标题
DOI：
10.1038/s41467-018-06688-y
复制
发表时间：
2018-10-05
影响因子：
16.6
通讯作者：
Gotsmann B
中科院分区：
文献类型：
--
作者：
Gooth J;Menges F;Kumar N;Süβ V;Shekhar C;Sun Y;Drechsler U;Zierold R;Felser C;Gotsmann B
与普通金属形成鲜明对比的是，在电子彼此或与声子强烈相互作用的材料中，电子传输被认为类似于粘性流体的流动。尽管它们的差异，据预测，在传统的和相关的材料中的传输是从根本上限制的不确定性原理应用于能量耗散。在这里，我们报告的观察实验签名的流体动力学电子流的外尔半金属二磷化钨。使用热和磁电输运实验，我们发现从传统的金属状态在较高的温度下的流体动力学电子流体低于20 K的过渡的迹象。流体动力学状态的特征是电阻率对样品宽度的粘性诱导依赖性以及对Wiedemann-Franz定律的强烈违反。根据不确定性原理，电和热输运都受到量子不确定性的约束，与底层的输运机制无关。低无序金属材料制造的进展使得达到电子输运的流体动力学状态成为可能。在这里，作者研究了二磷化钨中的流体动力学电子流体，发现电和热输运都受到量子不确定性的限制。
In stark contrast to ordinary metals, in materials in which electrons strongly interact with each other or with phonons, electron transport is thought to resemble the flow of viscous fluids. Despite their differences, it is predicted that transport in both conventional and correlated materials is fundamentally limited by the uncertainty principle applied to energy dissipation. Here we report the observation of experimental signatures of hydrodynamic electron flow in the Weyl semimetal tungsten diphosphide. Using thermal and magneto-electric transport experiments, we find indications of the transition from a conventional metallic state at higher temperatures to a hydrodynamic electron fluid below 20 K. The hydrodynamic regime is characterized by a viscosity-induced dependence of the electrical resistivity on the sample width and by a strong violation of the Wiedemann–Franz law. Following the uncertainty principle, both electrical and thermal transport are bound by the quantum indeterminacy, independent of the underlying transport regime. Advances in the fabrication of low-disorder metallic materials have made it possible to reach the hydrodynamic regime of electronic transport. Here the authors investigate a hydrodynamic electron fluid in tungsten diphosphide and find that both electrical and thermal transport are limited by the quantum indeterminacy.
登录
查看更多内容
影响因子：
8.6
作者：
Alekseev, P. S.
通讯作者：
Alekseev, P. S.
影响因子：
16.6
作者：
Kumar N;Sun Y;Xu N;Manna K;Yao M;Süss V;Leermakers I;Young O;Förster T;Schmidt M;Borrmann H;Yan B;Zeitler U;Shi M;Felser C;Shekhar C
通讯作者：
Shekhar C
影响因子：
3.7
作者：
Foster, Matthew S.;Aleiner, Igor L.
通讯作者：
Aleiner, Igor L.
影响因子：
2.1
作者：
GLOOS, K;MITSCHKA, C;SMEIBIDL, P
通讯作者：
SMEIBIDL, P
影响因子：
3.5
作者：
Karg, S. F.;Troncale, V.;Gotsmann, B.
通讯作者：
Gotsmann, B.