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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-8237
DTSTART:20230410T170000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T052931Z
LAST-MODIFIED:20230327T005833Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Magnetohydrodynamics of Dirac Plasma in Graphene\, Plasma Phys
 ics (Physics/ECE/NE 922) Seminar\, Alex Levchenko\, UW - Madison
DESCRIPTION:Interactions between electrons in solid-state systems can 
 lead to collective behavior described by hydrodynamics. One such syste
 m is the electron-hole plasma in graphene near the charge-neutrality p
 oint\, which can form a strongly coupled Dirac fluid. In this talk\, I
  will present results for hydrodynamic electron magnetotransport in gr
 aphene devices. In these systems\, a distinct mechanism of magnetoresi
 stance appears which is absent in systems with Galilean-invariant elec
 tron liquid. The resulting magnetoresistance depends on the intrinsic 
 conductivity and viscosity of the electron liquid\, and becomes especi
 ally pronounced near charge neutrality. This mechanism is related to  
 Alfven's theorem on frozen-in magnetic field in magneto-hydrodynamics\
 , according to which the motion of a perfectly conducting liquid perpe
 ndicular to the magnetic field lines is forbidden. In addition\, we wi
 ll consider thermoelectric phenomena and discuss hydrodynamic paradox 
 in Corbino devices. <br>\n<br>\nThis talk is based on: <br>\nPHYSICAL 
 REVIEW B 102\, 075305 (2020)<br>\nPHYSICAL REVIEW B 105\, 155307 (2022
 )<br>\nPHYSICAL REVIEW B 106\, L201306 (2022
URL:https://www.physics.wisc.edu/events/?id=8237
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