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High entropy alloys are multi-element random alloys with a strong short range disorder. Here, the authors show that their heat carrying lattice waves, while strongly attenuated by the force-constant disorder, propagate until high energy.

The pseudogap state in high-Tc superconducting copper oxides in one of the most mysterious quantum states of matter whose understanding remains a challenge for condensed matter physicists. The authors report a hidden magnetic texture deep in the pseudogap state highlighting another piece of the puzzle.

Phonon lifetime is a fundamental parameter of thermal transport however its determination is challenging. Using inelastic neutron scattering and the neutron resonant spin-echo technique, Lory et al. determine the acoustic phonon lifetime in a single crystal of clathrate Ba7.81Ge40.67Au5.33.

Exploring ordered states in similarly structured oxides aids the understanding of structure-property correlations. Here the authors discover an unconventional magnetic order in Sr2(Ir,Rh)O4, which is analogous to a loop-current phase in cuprate superconductors with the same lattice structure.