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Description
Sr₂IrO₄ is a 5d Mott insulator that shares the defining characteristics with the high-temperature cuprate superconductors. The absence of superconductivity in doped Sr₂IrO₄ makes it an attractive platform to study the low-temperature electronic properties and manifestation of quantum criticality therein. In this study, we synthesize a series of Sr₂(Ir,Rh) O₄ polycrystalline samples with 0 < x < 0.26 and measure their magnetic susceptibility and specific heat down to 2K. In combination with complementary Hall effect measurements, we study the change in electronic properties across the putative quantum critical point at x Rh ≈ 0.15, at which the long-range antiferromagnetic order is fully suppressed, and discuss the evolution of electronic ground state in Sr₂(Ir,Rh)O₄.