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Condensed Matter Seminar: "Hall diffusion anomaly and transverse Einstein relation"

Event Type
Seminar/Symposium
Sponsor
Physics - Condensed Matter
Location
Via ZOOM - see description for link
Virtual
Date
Sep 25, 2020   1:00 pm  
Speaker
Giovanni Vignale, University of Missouri
Contact
Stephen Bullwinkel
E-Mail
bullwink@illinois.edu
Phone
217-333-1652
Views
10
Originating Calendar
Physics - Condensed Matter Seminar

It is commonly believed that the current response of an electron fluid to a mechanical force (such as an electric field) or to a “statistical force” (e.g., a gradient of chemical potential) are governed by a single linear transport coefficient - the electric conductivity. We argue that this is not the case in anomalous Hall materials. In particular, we find that transverse (Hall) currents manifest two distinct Hall responses governed by an unconventional transverse Einstein relation that captures an anomalous relation between the Hall conductivity and the Hall diffusion constant. We give examples of when the Hall diffusion anomaly is prominent, resulting in situations where the transverse diffusion process overwhelms the Hall conductivity and vice versa.

Zoom link will be forwarded to Condensed Matter Seminar email list.  For a copy of the link or to be added to the email list, please contact Stephen Bullwinkel (bullwink@illinois.edu).

 
 
 
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