Interface hole-doping in cuprate-titanate superlattices

Abstract

The electronic structure of interfaces between YBa${}_2$Cu${}_3$O${}_6$ and SrTiO${}_3$ is studied using local spin density approximation (LSDA) with intra-atomic Coulomb repulsion (LSDA+U). We find a metallic state in cuprate/titanate heterostructures with the hole carriers concentrated substantially in the CuO${}_2$-layers and in the first interface TiO${}_2$ and SrO planes. This effective interface doping appears due to the polarity of interfaces, caused by the first incomplete copper oxide unit cell. Interface-induced high pre-doping of CuO${}_2$-layers is a key mechanism controlling the superconducting properties in engineered field-effect devices realized on the basis of cuprate/titanate superlattices.

5 pages, 5 figures

References in corpus (4)

• A Structural Probe of the Doped Holes in Cuprate Superconductors
• Physics of cuprates with the two-band Hubbard model - The validity of the one-band Hubbard model
• Atomic and Electronic Structures of Unreconstructed Polar MgO(111) Thin Film on Ag(111)
• Electrostatic interface tuning in correlated superconducting heterostructures

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• Factors limiting ferroelectric field-effect doping in complex-oxide heterostructures
• Mechanism of orbital reconstruction at the interfaces of transition metal oxides
• Electronic structure, magnetic properties and pairing tendencies of the copper-based honeycomb lattice Na${}_2$Cu${}_2$TeO${}_6$
• Magnetically ordered state at correlated oxide interfaces: the role of random oxygen defects
• Interstitial Fe-Cr alloys: Tuning of magnetism by nanoscale structural control and by implantation of nonmagnetic atoms
• Electronic charge and orbital reconstruction at cuprate-titanate interfaces