Pedro ContrerasDianela OsorioEugeniy Yurievich Beliayev2026-03-222026-03-22202210.2139/ssrn.4143305https://doi.org/10.2139/ssrn.4143305https://andeanlibrary.org/handle/123456789/72077enStrontiumLanthanumCuprateTight bindingChemistryPhysicsCrystallographyMaterials scienceThe Tight-Binding Flat Band Case in the Strontium-Substituted Lanthanum Cupratearticle