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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-9582
DTSTART:20260416T150000Z
DTEND:20260416T230000Z
DTSTAMP:20260413T070056Z
LAST-MODIFIED:20260413T022418Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Anomalous Hall effect and piezomagnetism in altermagnets\, R. 
 G. Herb Condensed Matter Seminar\, Maxim Khodas \, Hebrew University o
 f Jerusalem
DESCRIPTION:I begin with a general exposition of altermagnetism\, intr
 oducing the two-dimensional Lieb lattice as the simplest realization o
 f this novel magnetic phase. The anomalous Hall effect arising from al
 termagnetic order and spin–orbit interaction is discussed based on s
 ymmetry considerations and illustrated with several examples. A compar
 ison between the magnetic point-group and spin-space-group formulation
 s is presented\, demonstrating that the Berry-curvature singularity at
  nodal lines gives rise to a linear\, non-analytic scaling of the intr
 insic Hall conductivity with spin–orbit coupling.
\nIn the second pa
 rt of the talk\, I consider the extrinsic anomalous Hall effect in the
  limit of large exchange splitting. In materials with a finite Dzyalos
 hinskii–Moriya–type interaction\, the extrinsic contribution remai
 ns essential even in the clean limit. This naturally separates alterma
 gnetic symmetry classes into two distinct categories\, differing from 
 other classifications found in the literature.
URL:https://www.physics.wisc.edu/events/?id=9582
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