This title appears in the Scientific Report :
2012
Please use the identifier:
http://dx.doi.org/10.1038/ncomms1989 in citations.
Higgs transition from a manetic Coulomb liquid to a ferromagnet in Yb2Ti2O7
Higgs transition from a manetic Coulomb liquid to a ferromagnet in Yb2Ti2O7
In a class of frustrated magnets known as spin ice, magnetic monopoles emerge as classical defects and interact via the magnetic Coulomb law. With quantum-mechanical interactions, these magnetic charges are carried by fractionalized bosonic quasi-particles, spinons, which can undergo Bose-Einstein c...
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Personal Name(s): | Chang, L.-J. |
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Onoda, S. / Su, Y. / Kao, Y.-J. / Tsuei, K.-D. / Yasui, Y. / Kakurai, K. / Lees, M.R. | |
Contributing Institute: |
Streumethoden; PGI-4 Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Nature Communications, 3 (2012) Article number: 992, |
Imprint: |
London
Nature Publishing Group
2012
|
DOI: |
10.1038/ncomms1989 |
PubMed ID: |
22871811 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Nature Communications
3 |
Subject (ZB): | |
Publikationsportal JuSER |
In a class of frustrated magnets known as spin ice, magnetic monopoles emerge as classical defects and interact via the magnetic Coulomb law. With quantum-mechanical interactions, these magnetic charges are carried by fractionalized bosonic quasi-particles, spinons, which can undergo Bose-Einstein condensation through a first-order transition via the Higgs mechanism. Here, we report evidence of a Higgs transition from a magnetic Coulomb liquid to a ferromagnet in single-crystal Yb(2)Ti(2)O(7). Polarized neutron scattering experiments show that the diffuse [111]-rod scattering and pinch-point features, which develop on cooling are suddenly suppressed below T(C)~0.21 K, where magnetic Bragg peaks and a full depolarization of the neutron spins are observed with thermal hysteresis, indicating a first-order ferromagnetic transition. Our results are explained on the basis of a quantum spin-ice model, whose high-temperature phase is effectively described as a magnetic Coulomb liquid, whereas the ground state shows a nearly collinear ferromagnetism with gapped spin excitations. |