Pyrochlore oxide Hg<sub>2</sub>Os<sub>2</sub>O<sub>7</sub> on verge of metal–insulator boundary
Pyrochlore oxide Hg<sub>2</sub>Os<sub>2</sub>O<sub>7</sub> on verge of metal–insulator boundary
Semimetallic osmium pyrochlore oxide Cd2Os2O7undergoes a magnetic transition to an all-in-all-out (AIAO)-type order at 227 K, followed by a crossover to an AIAO insulator at around 210 K. Here, we studied the isostructural and isoelectronic compound Hg2Os2O7through thermodynamic measurements, muon spin rotation (μSR) spectroscopy and neutron diffraction experiments. A similar …