UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data shown on the profile page to:

http://www.ucl.ac.uk/finance/secure/research/post_award
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
High pressure route to generate magnetic monopole dimers in spin ice
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Zhou HD, Bramwell ST, Cheng JG, Wiebe CR, Li G, Balicas L, Bloxsom JA, Silverstein HJ, Zhou JS, Goodenough JB, Gardner JS
  • Publisher:
    NATURE PUBLISHING GROUP
  • Publication date:
    09/2011
  • Journal:
    NAT COMMUN
  • Volume:
    2
  • Print ISSN:
    2041-1723
  • Language:
    EN
  • Keywords:
    IONIC SYSTEMS, FRUSTRATION, HO2TI2O7, LATTICE, COULOMB, MODELS, LIQUID, PHASE
  • Addresses:
    Gardner, JS
    Indiana Univ
    Bloomington
    IN
    47408
    USA

    NIST
    NIST Ctr Neutron Res
    Gaithersburg
    MD
    20899
    USA

    UCL
    Dept Phys & Astron
    London
    WC1H OAH
    England
Abstract
The gas of magnetic monopoles in spin ice is governed by one key parameter: the monopole chemical potential. A significant variation of this parameter could access hitherto undiscovered magnetic phenomena arising from monopole correlations, as observed in the analogous electrical Coulomb gas, like monopole dimerization, critical phase separation, or charge ordering. However, all known spin ices have values of chemical potential imposed by their structure and chemistry that place them deeply within the weakly correlated regime, where none of these interesting phenomena occur. Here we use high-pressure synthesis to create a new monopole host, Dy2Ge2O7, with a radically altered chemical potential that stabilizes a large fraction of monopole dimers. The system is found to be ideally described by the classic Debye-Huckel-Bjerrum theory of charge correlations. We thus show how to tune the monopole chemical potential in spin ice and how to access the diverse collective properties of magnetic monopoles.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Authors
Dept of Physics & Astronomy
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by