Matthew Enjalran

Neutron scattering investigation of the spin ice state in Dy2Ti2O7

Dy2Ti2O7 has been advanced as an ideal spin ice material. We present a neutron scattering investigation of a single-crystal sample of (Dy2Ti2O7)-Dy-162. The scattering intensity has been mapped in zero applied field in the h,h,l and h,k,0 planes of reciprocal space at temperatures between 0.05 and 20 K. The measured diffuse scattering has been compared with that predicted by the dipolar spin ice model. The comparison is good, except at the Brillouin-zone boundaries where extra scattering appears in the experimental data. It is concluded that the dipolar spin ice model provides a successful basis for understanding Dy2Ti2O7, but that there are issues which remain to be clarified.

Understanding paramagnetic spin correlations in the spin-liquid pyrochlore Tb 2 Ti 2 O 7

Recent elastic and inelastic neutron scattering studies of the highly frustrated pyrochlore antiferromagnet

Theory of paramagnetic scattering in highly frustrated magnets with long-range dipole-dipole interactions: The case of the Tb 2 Ti 2 O 7 pyrochlore antiferromagnet

{\mathrm{Tb}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}

Spin Hamiltonian, Competing Small Energy Scales and Incommensurate Long Range Order in the Highly Frustrated Gd3Ga5O12 Garnet Antiferromagnet

have shown some very intriguing features that cannot be modeled by the local

Sign change of the extended s -wave pairing vertex in the dynamic Hubbard model: A quantum Monte Carlo study

〈111〉

The spin liquid state of the Tb2Ti2O7 pyrochlore antiferromagnet: a puzzling state of affairs

classical Ising model, naively expected to describe this system at low temperatures. By including single-ion excitations from the ground state doublet to higher crystal field levels, we successfully describe the elastic neutron scattering pattern and dispersion relations in

Ill-behaved convergence of a model of the Gd3Ga5O12 garnet antiferromagnet with truncated magnetic dipole?dipole interactions

{\mathrm{Tb}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7},

Dynamic Hubbard model: a Monte Carlo study

quantitatively consistent with experimental observations.

Geometric Frustration in the Mixed Layer Pnictide Oxides

Highly frustrated antiferromagnets composed of magnetic rare-earth moments are currently attracting much experimental and theoretical interest. Rare-earth ions generally have small exchange interactions and large magnetic moments. This makes it necessary to understand in detail the role of long-range magnetic dipole-dipole interactions in these systems, in particular, in the context of spin-spin correlations that develop in the paramagnetic phase, but are often unable to condense into a conventional long-range magnetic-ordered phase. This scenario is most dramatically emphasized in the frustrated pyrochlore antiferromagnet material

Refrustration and competing orders in the prototypical Dy2Ti2O7 spin ice material

{\mathrm{Tb}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}