Abstract
We employ the previously published neutron-scattering experiments to suggest that Er2Ti2O7 has a broken-symmetry multiple-q state with tetragonal magnetic symmetry. The ordered moments do not appear to lie close to the crystal-field anticipated directions, and we suggest that the low-energy gapless mode, visible in specific-heat measurements, is not of the usual transverse isotropic Goldstone-mode type but is longitudinal and is associated with the internal transfer of magnetism between distinct magnetic Bragg spots.
| Original language | English |
|---|---|
| Pages (from-to) | 094427 |
| Number of pages | 1 |
| Journal | Physical Review B |
| Volume | 84 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sept 2011 |