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SUMMARY:IEEE Distinguished Lecture: Spin Conversion Phenomena in Spintroni
 cs - Prof. Yoshichika Otani\, University of Tokyo\, Japan
DTSTART:20180403T150000Z
DTEND:20180403T160000Z
UID:TALK103609@talks.cam.ac.uk
CONTACT:65020
DESCRIPTION:Since the discovery of giant magnetoresistance\, spintronics r
 esearch has been evolving and has reached a new phase in which the concept
  of spin currents\, i.e.\, the flow of spin angular momenta\, helps us und
 erstand various spintronics phenomena. These include all the recently disc
 overed conversion phenomena\, such as the direct and inverse spin Hall eff
 ects\, spin Seebeck and Peltier effects\, spin pumping\, and the inverse F
 araday effect. More recently\, Rashba interfaces and the surface states of
  topological insulators were found to exhibit the so-called Edelstein effe
 ct\, in which spin-momentum locking behavior brings about non-equilibrium 
 spin accumulation.\n\nThese interface and surface effects thus provide an 
 effective means of interconversion among spin\, charge\, and heat currents
 . Most of the above-mentioned spin conversion phenomena take place at simp
 le nanoscale interfaces between two different types of materials (e.g.\, m
 agnets\, non-magnets\, semiconductors\, and insulators). These structures 
 may enable us to advance spin-mediated interconversion among physical enti
 ties such as electricity\, light\, sound\, vibration\, and heat.\n\nI will
  first give an introduction to the general spin-mediated spin-conversion p
 rocesses and then will focus on magneto-electric spin conversion in conduc
 tive solids\, including spin Hall effects and new conversion mechanisms:  
 Edelstein effects arising at Rashba interfaces [1] and surface states of t
 opological insulators [2]\, as discussed in a recently published progress 
 article [3]. \n \n[1] S. Karube\, K. Kondou\, and Y. Otani\, “Experiment
 al observation of spin-to-charge current conversion at non-magnetic metal/
 Bi2O3 interfaces\,” Appl. Phys. Exp.\, vol. 9\, 033001\, 2016.\n[2] K. K
 ondou et al.\, “Fermi-level-dependent charge-to-spin current conversion 
 by Dirac surface states of topological insulators\,” Nature Phys.\, vol.
  12\, pp. 1027-1031\, 2016.\n [3] Y. Otani et al.\, “Spin conversion on 
 the nanoscale\,” Nature Phys.\, vol. 13\, pp. 829-832\, 2017. \n
LOCATION:Small Lecture Theatre (Bragg Building)\, Cavendish Laboratory
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