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SUMMARY:Coupling Spin and Charge Transport in Complex Materials - Dr Marti
 n Gradhand\, University of Bristol
DTSTART:20151203T141500Z
DTEND:20151203T151500Z
UID:TALK60935@talks.cam.ac.uk
CONTACT:Gareth Conduit
DESCRIPTION:Spin-orbit driven Hall type effects\, e.g. spin (SHE) and anom
 alous Hall effect (AHE)\, have been under intensive research over the past
  decade. The growing interest into these effects is partially due to the t
 echnological significance of the SHE effect in the area of magnetic random
  access memory (MRAM). In the wake of this technological interest into the
  SHE\, the AHE regained interest because it shares the same driving mechan
 ism but is much easier accessible experimentally.\n\nIn this talk I will i
 ntroduce the basic concepts for spin-orbit driven transport phenomena invo
 lving the Berry curvature of Bloch electrons and the scattering at lattice
  imperfections. Furthermore\, I give a brief introduction to the technolog
 ical aspects of the ongoing research with spin-orbit induced torques as th
 e main ingredients of MRAM devices.\n\nFinally\, I will present our contri
 butions to the field with material dependent transport calculations on all
  mechanisms which lead to a much deeper understanding of the underlying ph
 ysics especially how to enhance the effect with appropriate material desig
 n. Ultimately\, since the existence of transport phenomena is intertwined 
 with the symmetry of the underlying system charge and spin Hall probes can
  be exploited to probe novel states of matter. 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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