Magnetic response of a two-dimensional viscous electron fluid

Turkish Journal of Physics

article

KESER, AYDIN CEM¹  SUSHKOV, OLEG¹ 

[1] School of Physics, University of New South Wales;Australian Research Council Centre of Excellence in Future Low-Energy Electronics Technologies,University of New South Wales

关键词: Carrier dynamics;    dissipative dynamics;    electrical conductivity;    friction;    interparticle interactions;    magnetotransport;   

DOI  :  10.55730/1300-0101.2736

学科分类：物理（综合）

来源: Scientific and Technical Research Council of Turkey - TUBITAK

【 摘 要 】

It has been established that the Coulomb interactions can transform the electron gas into a viscous fluid. This fluid is realized in a number of platforms, including graphene and two-dimensional semiconductor heterostructures. The defining characteristic of the electron fluid is the formation of layers of charge carriers that are in local thermodynamic equilibrium, as in classical fluids. In the presence of nonuniformities, whirlpools and nontrivial flow profiles are formed, which have been directly imaged in recent experiments. In this paper, we theoretically study the response of the electron fluid to localized magnetic fields. We find that the electric current is suppressed by viscous vortices in regions where magnetic field is sharply varying, causing strong transport signatures. Experimentally, our considerations are relevant since local magnetic fields can be applied to the system through implanting adatoms or embedding micromagnets in the top-gate. Our theory is essential for the characterization and future applications of electron fluids in hydrodynamic spin transport.

【 授权许可】

Unknown