| Dirac strings and magnetic monopoles in the spin ice Dy2Ti2O7. | |
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MedLine Citation:
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PMID: 19729617 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Sources of magnetic fields-magnetic monopoles-have so far proven elusive as elementary particles. Condensed-matter physicists have recently proposed several scenarios of emergent quasiparticles resembling monopoles. A particularly simple proposition pertains to spin ice on the highly frustrated pyrochlore lattice. The spin-ice state is argued to be well described by networks of aligned dipoles resembling solenoidal tubes-classical, and observable, versions of a Dirac string. Where these tubes end, the resulting defects look like magnetic monopoles. We demonstrated, by diffuse neutron scattering, the presence of such strings in the spin ice dysprosium titanate (Dy2Ti2O7). This is achieved by applying a symmetry-breaking magnetic field with which we can manipulate the density and orientation of the strings. In turn, heat capacity is described by a gas of magnetic monopoles interacting via a magnetic Coulomb interaction. |
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Authors:
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D J P Morris; D A Tennant; S A Grigera; B Klemke; C Castelnovo; R Moessner; C Czternasty; M Meissner; K C Rule; J-U Hoffmann; K Kiefer; S Gerischer; D Slobinsky; R S Perry |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-09-03 |
Journal Detail:
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Title: Science (New York, N.Y.) Volume: 326 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-10-16 Completed Date: 2009-10-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
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Languages: eng Pagination: 411-4 Citation Subset: - |
Affiliation:
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Helmholtz-Zentrum Berlin für Materialien und Energie, Glienicker Str. 100, D-14109 Berlin, Germany. jonathan.morris@helmholtz-berlin.de |
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| Comments/Corrections | |
Comment In:
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Science. 2009 Oct 16;326(5951):375-6
[PMID:
19833948
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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