Signatures of orbital selective Mott state in doped Sr3Ru2 O7

Bilayer Strontium Ruthenate Sr3Ru2O7 is a strongly correlated electronic system that shows diverse electronic and structural phases. Upon doping with Mn, an orbital selective Mott phase is observed before the material transitions to a Mott insulating state. Additionally, Mn doping leads to the emergence of an antiferromagnetic state with qAFM=(π/2,π/2) ordering wave vector. Quasiparticle interference (QPI) experiments find a sharp but highly dispersive peak at the AFM wave vector. Another set of QPI peaks is observed at q∗=(π,0), possibly due to a charge order effect. In this work we utilize a tight binding model relevant to Mn doped Sr3Ru2O7, and show that the origin of observed orbital selective Mott phase is inherently dependent upon the presence of a strong onsite exchange interaction and oxygen octahedral rotation suppression induced by the Mn doping. We further find that the experimentally observed QPI spectra, including the peaks at qAFM, and q∗ wave vectors can be concomitantly explained within this formalism.