311 citations · 787 across the 7 of their papers we have counts for
7 papers
Soft modes in the easy plane pyrochlore antiferromagnet
J D M Champion, P C W Holdsworth
Thermal fluctuations lift the high ground state degeneracy of the classical nearest neighbour pyrochlore antiferromagnet, with easy plane anisotropy, giving a first order phase tra…
A pure Hubbard model with demonstrable pairing adjacent to the Mott-insulating phase
J. D. Champion, M. W. Long
We introduce a Hubbard model on a particular class of geometries, and consider the effect of doping the highly spin-degenerate Mott-insulating state with a microscopic number of ho…
Er2Ti2O7: Evidence of Order by Disorder in a Frustrated Antiferromagnet
J. D. M. Champion, M. J. Harris, P. C. W. Holdsworth +14
Er_2Ti_2O_7 has been suggested to be a realization of the frustrated < 111 > XY pyrochlore lattice antiferromagnet, for which theory predicts fluctuation-induced symmetry breaking…
Field Induced Partial Order in the Spin-Ice Dysprosium Titanate
T. Fennell, O. A. Petrenko, G. Balakrishnan +5
Neutron scattering has been used to investigate the magnetic correlations in the the spin ice material dysprosium titanate, Dy2Ti2O7. An isotopically enriched sample was used to mi…
Order in the Heisenberg Pyrochlore: The Magnetic Structure of Gd2Ti2O7
J. D. M. Champion, A. S. Wills, T. Fennell +3
The rare earth pyrochlore material Gd2Ti2O7 is considered to be an ideal model frustrated Heisenberg antiferromagnet with additional dipolar interactions. For this system there are…
Competition Between Exchange and Anisotropy in a Pyrochlore Ferromagnet
J. D. M. Champion, S. T. Bramwell, P. C. W. Holdsworth +1
The Ising-like spin ice model, with a macroscopically degenerate ground state, has been shown to be approximated by several real materials. Here we investigate a model related to s…
Spin Correlations in HoTiO: a Dipolar Spin Ice System
S. T. Bramwell, M. J. Harris, B. C. den Hertog +8
The pyrochlore material has been suggested to show ``spin ice'' behaviour. We present neutron scattering and specific heat results that establish unambiguou…