1：Experimental Design and Method Selection:

Solid-state reaction technique was used to synthesize polycrystalline Sr2Ir1-xZnxO4 samples. Powder x-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) were employed for structural and compositional analysis. Resistivity was measured using a four-terminal method, and magnetic properties were determined using SQUID-VSM.

2：Sample Selection and Data Sources:

Samples with nominal Zn doping levels (x = 0 to

3：06) were prepared from SrCO3 (9%), IrO2 (9%), and ZnO2 (9%) powders. List of Experimental Equipment and Materials:

Rigaku-TTR3 x-ray diffractometer with Cu Kα radiation, Oxford Swift 3000 spectrometer with Hitachi TM3000 scanning electron microscope for EDS, Janis 9T for resistivity measurements, SQUID-VSM for magnetic measurements.

4：Experimental Procedures and Operational Workflow:

Powders were mixed, ground, heated at 1050°C for 10 h, kept at 1280°C for 24 h, and further heated at 1300°C for 40 h with intermediate grindings. XRD and EDS were performed to check purity and composition. Resistivity and magnetization measurements were conducted at various temperatures and fields.

5：Data Analysis Methods:

Resistivity data were fitted to ρ(T) = ρ0exp(Δ/kB T) to extract energy gaps. Magnetization data were analyzed using Curie-Weiss law and hysteresis loops to determine magnetic moments.