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To investigate whether the dense Kondo compound CeB6 might evolve into atopological insulator under sufficient pressure, four-point electricalresistivity measurements have been carried out over the temperature range 1.3 Kto 295 K in a diamond anvil cell to 122 GPa. The temperature of the resistivitymaximum initially increases slowly with pressure but disappears between 12 and20 GPa. The marked changes observed under pressure suggest that a valenceand/or structural transition may have occurred. Synchrotron x-ray diffractionmeasurements, however, fail to detect any change in crystal structure to 85GPa. Although a transition into an insulating phase is not observed, this denseKondo system is completely suppressed at 43 GPa, leaving behind what appears tobe a conventional Fermi liquid metal.

Suppression of dense Kondo state in CeB6 under pressure