Zobrazeno 1 - 10
of 207
pro vyhledávání: '"Champion, J. P."'
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Champion, J D M, Holdsworth, P C W
Publikováno v:
J. Phys.: Condens. Matter 16 (2004) S665--S671
Thermal fluctuations lift the high ground state degeneracy of the classical nearest neighbour pyrochlore antiferromagnet, with easy plane anisotropy, giving a first order phase transition to a long range ordered state. We show, from spin wave analysi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310185
Autor:
Champion, J. D., Long, M. W.
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 holes in the extreme strong-coupling limit. The geometry is quite genera
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302039
Autor:
Champion, J. D. M., Harris, M. J., Holdsworth, P. C. W., Wills, A. S., Balakrishnan, G., Bramwell, S. T., Cizmar, E., Fennell, T., Gardner, J. S., Lago, J., McMorrow, D. F., Orendac, M., Orendacova, A., Paul, D. McK., Smith, R. I., Telling, M. T. F., Wildes, A.
Publikováno v:
Physical Review B, 68, 020401(R) (2003)
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 in a highly degenerate ground state manifold. We present a theoretical
Externí odkaz:
http://arxiv.org/abs/cond-mat/0112007
Autor:
Fennell, T., Petrenko, O. A., Balakrishnan, G., Bramwell, S. T., Champion, J. D. M., Fak, B., Harris, M. J., Paul, D. McK.
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 minimise neutron absorption. In zero field no magnetic order was observe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107414
Publikováno v:
Phys. Rev. B 64, 140407(R), (2001)
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 several untested theoretical predictions of the ground state ordering
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105043
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 spin ice, in which the Ising spins are replaced by classical Heisenberg
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103051
Autor:
Bramwell, S. T., Harris, M. J., Hertog, B. C. den, Gingras, M. J. P., Gardner, J. S., McMorrow, D. F., Wildes, A. R., Cornelius, A. L., Champion, J. D. M., Melko, R. G., Fennell, T.
Publikováno v:
Phys. Rev. Lett. {87}, 047205 (2001)
The pyrochlore material $\rm Ho_{2}Ti_{2}O_{7}$ has been suggested to show ``spin ice'' behaviour. We present neutron scattering and specific heat results that establish unambiguously that Ho$_2$Ti$_2$O$_7$ exhibits spin ice correlations at low tempe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0101114
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Albert, S., Bauerecker, S., Boudon, V., Brown, L.R., Champion, J.-P., Loëte, M., Nikitin, A., Quack, M.
Publikováno v:
In Chemical Physics 17 February 2009 356(1-3):131-146
