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SUMMARY:Magnetricity and magnetic monopoles in spin ice.
DTSTART:20120424T150000
DTSTAMP:20260501T175426Z
UID:b18c81b84421967f4ab7e29f2e5d67f28a71fb54d7675fa2bfb9f37b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Steve Bramwell from London centre for Nanotechnology and
  University College London\nThe analogy between spin configurations in spi
 n ice materials like Ho2Ti2O7 and proton configurations in water ice\, H2O
 \, has been appreciated for many years (see Ref. [1] for a review). Howeve
 r it is only in the last few years that this equivalence has been extended
  into the realm of electrodynamics [2\,3]. In this talk I shall describe o
 ur recent experimental work that identifies emergent magnetic charges ("mo
 nopoles")\, transient magnetic currents ("magnetricity") and the universal
  properties expected of an ideal magnetic Coulomb gas (magnetic electrolyt
 e - "magnetolyte"). These universal properties include the Onsager-Wien ef
 fect\, "corresponding states" behaviour\, Debye-Huckel screening and Bjerr
 um pairing [4-6]. I will describe experimental results for both traditiona
 l spin ice materials (Ho2Ti2O7\, Dy2Ti2O7) and a recently discovered syste
 m (Dy2Ge2O7).
LOCATION:PH L1 503
STATUS:CONFIRMED
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