Electronic Structure of Oxide Interfaces: A Comparative Analysis of GdTiO3/SrTiO3 and LaAlO3/SrTiO3 Interfaces

@article{Banerjee2015ElectronicSO,
  title={Electronic Structure of Oxide Interfaces: A Comparative Analysis of GdTiO3/SrTiO3 and LaAlO3/SrTiO3 Interfaces},
  author={Hrishit Banerjee and Sumilan Banerjee and Mohit Randeria and Tanusri Saha-Dasgupta},
  journal={Scientific Reports},
  year={2015},
  volume={5}
}
Emergent phases in the two-dimensional electron gas (2DEG) formed at the interface between two insulating oxides have attracted great attention in the past decade. We present ab-initio electronic structure calculations for the interface between a Mott insulator GdTiO3 (GTO) and a band insulator SrTiO3 (STO) and compare our results with those for the widely studied LaAlO3/SrTiO3 (LAO/STO) interface between two band insulators. Our GTO/STO results are in excellent agreement with experiments, but… 
Metallic behavior in STO/LAO heterostructures with non-uniformly atomic interfaces
Abstract The search for new and low-power switching devices involving the integration of semiconductor thin films is of interest, and has led to renewed research because such devices may exhibit
Polarization and charge-transfer effect on the transport properties in two-dimensional electron gases/LaNiO3 heterostructure
The film thickness dependent transport properties of the LaNiO3 (LNO) layer epitaxially grown on LaAlO3/SrTiO3 (LAO) 2-dimensional electronic gas (2DEG) have been investigated. The ultrathin LNO
Band Alignment at Heteroepitaxial Perovskite Oxide Interfaces. Experiments, Methods, and Perspectives
Recent advances in the growth of epitaxial oxide thin films have fostered a steady increase of research on perovskite oxide heterojunctions, which are now produced with unprecedented quality.
Comparison of geometry models in the study of perovskite heterostructures
Abstract Based on the first-principles calculations, the influence of different geometry models on the theoretical results about the electronic properties of LaAlO3/SrTiO3 perovskite heterostructures
Electronic and magnetic state of LaMnO3 epitaxially strained on SrTiO3 : Effect of local correlation and nonlocal exchange
Motivated by the puzzling report of the observation of a ferromagnetic insulating state in LaMnO$_3$/SrTiO$_3$ heterostructures, we calculate the electronic and magnetic state of LaMnO$_3$,
Oxidic 2D Materials
TLDR
This review focuses on recent advances in the rapidly growing field of two-dimensional materials, highlighting those with oxidic crystal structure like perovskites, garnets and spinels and their application potential as free-standing monolayers, bilayers and multilayers in a wide range of advanced technological applications.
Magnetism in iridate heterostructures leveraged by structural distortions
TLDR
The tuning of magnetic interactions in superlattices composed of single and bilayers of SrIrO3 inter-spaced with SrTiO3 in analogy to the Ruddlesden-Popper series iridates is reported.
Superconductivity of Strontium Titanate in Reduced Dimensions
In this thesis, I will summarize my work on mesoscale devices created at the hetero interface between complex oxides lanthanum aluminate and strontium titanate (LaAlO3/SrTiO3). In chapter I, the
Reaction pathways in the solid state and the Hubbard U correction.
TLDR
It is shown that, depending on the occupation of the transition metal d orbitals, the Hubbard U correction can cause severe instabilities in the migration barrier energies predicted using generalized gradient approximation density functional theory (GGA DFT).
Physics of SrTiO3-based heterostructures and nanostructures: a review.
TLDR
This review provides a summary of the rich physics expressed within SrTiO3-based heterostructure and nanostructures, including their phase diagram and coupling between the various degrees of freedom.
...
1
2
...

References

SHOWING 1-10 OF 45 REFERENCES
A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
TLDR
A model interface is examined between two insulating perovskite oxides—LaAlO3 and SrTiO3—in which the termination layer at the interface is controlled on an atomic scale, presenting a broad opportunity to tailor low-dimensional charge states by atomically engineered oxide heteroepitaxy.
Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures.
TLDR
It is found that, depending on specific growth protocols, the spatial extension of the high-mobility electron gas can be varied from hundreds of micrometres into SrTiO(3) to a few nanometres next to the LaAlO( 3)/SrTiO (3) interface.
Structure–Property Relation of SrTiO3/LaAlO3 Interfaces
A large variety of transport properties have been observed at the interface between the insulating oxides SrTiO3 and LaAlO3 such as insulation, 2D interface metallicity, 3D bulk metallicity, magnetic
Controlling the density of the two-dimensional electron gas at the SrTiO 3 /LaAlO 3 interface
The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in principle sustain an electron density of 3.3E14 cm-2 (0.5 electrons per unit cell). However, experimentally observed densities
Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
Heterostructures and superlattices consisting of a prototype Mott insulator, GdTiO3, and the band insulator SrTiO3 are grown by molecular beam epitaxy and show intrinsic electronic reconstruction,
Magnetic effects at the interface between non-magnetic oxides.
TLDR
The conducting oxide interface now provides a versatile system to induce and manipulate magnetic moments in otherwise non-magnetic materials.
Dimer Mott insulator in an oxide heterostructure
We study the problem of designing an artificial Mott insulator in a correlated oxide heterostructure. We consider the extreme limit of quantum confinement based on ionic discontinuity doping, and
Carrier-controlled ferromagnetism in SrTiO3
Magnetotransport and superconducting properties are investigated for uniformly La-doped SrTiO3 films and GdTiO3/SrTiO3 heterostructures, respectively. GdTiO3/SrTiO3 interfaces exhibit a high-density
Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
LaAlO{sub 3} and SrTiO{sub 3} are insulating, nonmagnetic oxides, yet the interface between them exhibits a two-dimensional electron system with high electron mobility, superconductivity at low
Towards Mott design by $\delta$-doping of strongly correlated titanates
Doping the distorted-perovskite Mott insulators LaTiO$_3$ and GdTiO$_3$ with a single SrO layer along the [001] direction gives rise to a rich correlated electronic structure. A realistic
...
1
2
3
4
5
...