Measuring Hall viscosity of graphene's electron fluid.
Science
; 364(6436): 162-165, 2019 04 12.
Article
em En
| MEDLINE
| ID: mdl-30819929
ABSTRACT
An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence of current flow. Here, we report a qualitative deviation from the standard behavior in electron systems with high viscosity. We found that the viscous electron fluid in graphene responds to nonquantizing magnetic fields by producing an electric field opposite to that generated by the ordinary Hall effect. The viscous contribution is substantial and identified by studying local voltages that arise in the vicinity of current-injecting contacts. We analyzed the anomaly over a wide range of temperatures and carrier densities and extracted the Hall viscosity, a dissipationless transport coefficient that was long identified theoretically but remained elusive in experiments.
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Bases de dados:
MEDLINE
Tipo de estudo:
Qualitative_research
Idioma:
En
Revista:
Science
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Reino Unido