Pressure induced Superconductor-Insulator transition in the spinel compound CuRh2S4

Abstract

We performed resistivity measurements in CuRh${}_2$S${}_4$ under quasi-hydrostatic pressure of up to 8.0 GPa, and found a pressure induced superconductor-insulator (SI) transition. Initially, with increasing pressure, the superconducting transition temperature $T_c$ increases from 4.7 K at ambient pressure to 6.4 K at 4.0 GPa, but decreases at higher pressures. With further compression, superconductivity in CuRh${}_2$S${}_4$ disappears abruptly at a critical pressure $P_{\mathrm{SI}}$ between 5.0 and 5.6 GPa, when it becomes an insulator.

4 pages, 4 figures

References in corpus (1)

• From Mott insulator to ferromagnetic metal: a pressure study of Ca${}_2$RuO${}_4$

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