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SUMMARY:Spin-orbit coupled quantum magnets - Giniyat Khaliullin\, Max Plan
 ck Institute for Solid State Research\, Germany.
DTSTART:20140604T101500Z
DTEND:20140604T111500Z
UID:TALK52269@talks.cam.ac.uk
CONTACT:Helen Verrechia
DESCRIPTION:When relativistic spin-orbit coupling dominates over the excha
 nge and orbital-lattice interactions\, the spin and orbital degrees of fre
 edom are no longer separated\, and it is more convenient to formulate the 
 problem in terms of effective (pseudo)spin Hamiltonians. This greatly redu
 ces the initially large spin-orbital Hilbert space\; however\, the resulti
 ng low-energy Hamiltonians may obtain highly nontrivial structure\, becaus
 e the pseudospins inherit bond-directional and frustrated nature of orbita
 l interactions. I will discuss ”the pseudospin” physics in layered iri
 dium oxides\, and present also the re-cent work on spin-orbit driven magne
 tic criticality in d4 Mott insulators such as ruthenates.
LOCATION:Mott Seminar Room (531)\, Cavendish Laboratory\, Department of Ph
 ysics
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