Abstract:

Coulomb correlations between up- and down-spin components of a paramagnetic or uniformly spin-polarized electron liquid are responsible for a number of intriguing phenomena in spin transport. In this seminar I focus on the phenomenon of the ``spin Coulomb drag" -- an intrinsic source of resistance that specifically affects the spin current -- and on the closely related concept of the ``spin mass" -- a novel mass renormalization that modifies the relation between the spin-current carried by a quasiparticle and its momentum. I discuss the influence of these many-body effects on the magnetoresistance and the efficiency of spin-current injection in magnetic multilayers.
 
 
  Return