%0 Journal Article
%A Samartzis, A.
%A Xu, J.
%A Anand, V. K.
%A Islam, A. T. M. N.
%A Ollivier, J.
%A Su, Y.
%A Lake, B.
%T Pinch points and half-moons in dipolar-octupolar Nd2Hf2O7
%J Physical review / B
%V 106
%N 10
%@ 1098-0121
%C Woodbury, NY
%I Inst.
%M FZJ-2022-03534
%P L100401
%D 2022
%X While it is established that the pinch point scattering pattern in spin ice arises from an emergent Coulomb phase associated with a magnetic moment that is divergence free, more complex Hamiltonians can introduce a divergence-full part. If these two parts remain decoupled, they give rise to the coexistence of distinct features. Here, we show that the moment in Nd2Hf2O7 forms a static long-range ordered ground state, a flat, gapped pinch point excitation, and dispersive excitations. These results confirm recent theories which predict that the dispersive modes, which arise from the divergence-full moment, host a pinch point pattern of their own, observed experimentally as “half-moons.”
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000858959100003
%R 10.1103/PhysRevB.106.L100401
%U https://juser.fz-juelich.de/record/909940