2011/03/15 by A. K. R. Briffa, R. J. Mason, Richard Mason +2 · 1 citation
Chemistry · Earth and Planetary Sciences · Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Geometry #High-pressure geophysics and materials #Magnetism #Mathematics #Multiferroics and related materials #Physics #Symmetry (geometry) #Tetragonal crystal system #cond-mat.other #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.84.094427
10 pages, 5 figures
arxiv created 2011/03/15 · openalex publication_date 2011/09/20 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.