Strain-Modulated Slater-Mott Crossover of Pseudospin-Half Square-Lattice in ( SrIrO 3 ) 1 / ( SrTiO 3 ) 1 Superlattices

摘要: We report on the epitaxial strain-driven electronic and antiferromagnetic modulations of a pseudospin-half square-lattice realized in superlattices (SrIrO_{3})_{1}/(SrTiO_{3})_{1}. With increasing compressive strain, we find low-temperature insulating behavior to be strongly suppressed with corresponding systematic reduction both Neel temperature staggered moment. However, despite such suppression, system remains weakly above transition. The emergence metallicity is observed under large strain but only at temperatures far These behaviors are characteristics Slater-Mott crossover regime, providing unique experimental model spin-half Hubbard Hamiltonian tunable intermediate coupling strength.