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Contrary to the common belief that electron-electron interaction (EEI) shouldbe negligible in s-orbital-based conductors, we demonstrated that the EEIeffect could play a significant role on electronic transport leading to themisinterpretation of the Hall data. We show that the EEI effect is primarilyresponsible for an increase in the Hall coefficient in the La-doped SrSnO3films below 50 K accompanied by an increase in the sheet resistance. Thequantitative analysis of the magnetoresistance (MR) data yielded a large phasecoherence length of electrons exceeding 450 nm at 1.8 K and revealed theelectron-electron interaction being accountable for breaking of electron phasecoherency in La-doped SrSnO3 films. These results while providing criticalinsights into the fundamental transport behavior in doped stannates alsoindicate the potential applications of stannates in quantum coherent electronicdevices owing to their large phase coherence length.

Unraveling the Effect of Electron-Electron Interaction on Electronic Transport in High-Mobility Stannate Films