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SUMMARY:Emergent Coulombic criticality and Kibble-Zurek scaling in a topol
 ogical magnet - Claudio Castelnovo - Cavendish Laboratory
DTSTART:20160127T141500Z
DTEND:20160127T151500Z
UID:TALK63332@talks.cam.ac.uk
CONTACT:Mike Blake
DESCRIPTION:When a classical system is driven through a continuous phase t
 ransition\, its nonequilibrium response is universal\nand exhibits Kibble-
 Zurek scaling. We explore this dynamical scaling in the context of a three
 -dimensional\ntopological magnet with fractionalized excitations\, namely\
 , the liquid-gas transition of the emergent mobile\nmagnetic monopoles in 
 dipolar spin ice. Using field-mixing and finite-size scaling techniques\, 
 we place the critical point of the liquid-gas line in the three-dimensiona
 l Ising universality class. We then demonstrate Kibble-Zurek scaling for s
 weeps of the magnetic field through the critical point. Unusually slow mic
 roscopic time scales in spin ice offer a unique opportunity to detect this
  universal nonequilibrium physics within current experimental capability.
LOCATION:MR2\, Centre for Mathematical Sciences
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