scholarly journals Multicritical points in a model for 5f-electron systems under pressure and magnetic field

2021 ◽  
Author(s):  
Julian Faundez ◽  
Sergio G Magalhaes ◽  
Eleonir J Calegari ◽  
Peter S Riseborough
Keyword(s):  
Magnetic Field ◽  
Electron Systems ◽  
Multicritical Points

scholarly journals Measuring Hall viscosity of graphene’s electron fluid

Science ◽  
2019 ◽  
pp. eaau0685 ◽  
Author(s):  
A. I. Berdyugin ◽  
S. G. Xu ◽  
F. M. D. Pellegrino ◽  
R. Krishna Kumar ◽  
A. Principi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Transport Coefficient ◽  
Current Flow ◽  
High Viscosity ◽  
Electron Systems ◽  
Electrical Conductor ◽  
Electron Fluid ◽  
Wide Range ◽  
Hall Viscosity

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 find that the viscous electron fluid in graphene responds to non-quantizing 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 analyze the anomaly over a wide range of temperatures and carrier densities and extract the Hall viscosity, a dissipationless transport coefficient that was long identified theoretically but remained elusive in experiments.

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