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SUMMARY:Fluctuation-induced pair density wave in itinerant ferromagnets - 
 Prof Andrew Green\, UCL
DTSTART:20121122T141500Z
DTEND:20121122T154500Z
UID:TALK40983@talks.cam.ac.uk
CONTACT:Dr G Moller
DESCRIPTION:Magnetic fluctuations near to quantum criticality can have pro
 found effects. They lead to characteristic scaling at high temperature whi
 ch may ultimately give way to a reconstruction of the phase diagram and th
 e formation of new phases at low temperatures. The ferromagnet UGe2 is uns
 table to p-wave superconducting order - an effect presaged by the superflu
 idity in Helium-3 - whereas in CeFePO fluctuations drive the formation of 
 spiral magnetic order. Here we develop a general quantum-by-disorder descr
 iption of these systems that encompasses both of these instabilities in a 
 unified framework. Moreover\, in revealing their fundamentally common orig
 in\, we demonstrate how these instabilities can become intertwined to form
  a pair density wave.
LOCATION:TCM Seminar Room (530)\, Cavendish Laboratory
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