• Corpus ID: 238744458

Large Rashba Spin-orbit Effect by Orbital Engineering at SrTiO3 based Correlated Interfaces

  title={Large Rashba Spin-orbit Effect by Orbital Engineering at SrTiO3 based Correlated Interfaces},
  author={Ganesh Ji Omar and Weilong Kong and Hariom Jani and Mengsha Li and Jun Zhou and Zhi Shiuh Lim and Saurav Prakash and Shengwei Zeng and Sonu Hooda and Thirumalai Venkatesan and Yuan Ping Feng and Stephen John Pennycook and Shen Lei and Ariando Ariando},
Large spin-orbit effect is an essential element for efficient spin-orbitronics that utilizes the interplay between charge and spin degree of freedom. This spin-orbit effect is generally small in heavy-metal1-7-based or requires large external applied voltages in complex-oxide-based heterostructures8. Here, we present a large Rashba spin orbit effect at zero applied voltages by interfacial atomic control of orbital hybridization that introduces Ti-O lattice polarization at the SrTiO3-based… 

Figures from this paper


Theoretical model for Rashba spin-orbit interaction in d electrons
We show that the Rashba spin-orbit interaction in d electron solids, which originates from the broken inversion symmetry at surfaces or interfaces, is strongly dependent on the orbital characters of
Highly efficient and tunable spin-to-charge conversion through Rashba coupling at oxide interfaces.
This work makes use of an interface-driven spin-orbit coupling mechanism-the Rashba effect-in the oxide two-dimensional electron system (2DES) LaAlO3/SrTiO3 to achieve spin-to-charge conversion with unprecedented efficiency.
Enhancement of Rashba spin-orbit coupling by electron confinement at the LaAlO3/SrTiO3 interface.
This work reveals the intimate relationship between spatial inversion symmetry breaking and Rashba spin-orbit coupling at the LaAlO3/SrTiO3interface, and provides a new method to tune the Rashbaspin- orbit coupling, which is valuable in the application of oxide-spintronics.
Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy
Electrostatic gating experiments in LaAlO3/SrTiO3 wells of different crystal orientations show that the spatial extension and anisotropy of the 2D superconductivity and the Rashba spin–orbit field can be largely modulated by controlling the2DEG sub-band filling.
Tunable Rashba spin-orbit interaction at oxide interfaces.
A new example of an electronic property arising from the interfacial breaking of inversion symmetry, namely, a large Rashba spin-orbit interaction, whose magnitude can be modulated by the application of an external electric field is laid out.
Room-Temperature Giant Charge-to-Spin Conversion at the SrTiO3-LaAlO3 Oxide Interface.
A highly efficient spin generation with the efficiency of ∼6.3 in the STO/LAO/CoFeB structure at room temperature by using spin torque ferromagnetic resonance and it is suggested that the spin transmission through theLAO layer at a high temperature range is attributed to the inelastic tunneling via localized states in the LAO band gap.
Strongly enhanced Rashba splittings in an oxide heterostructure: A tantalate monolayer on BaHfO3
In the two-dimensional electron gas (2DEG) emerging at the transition metal oxide surface and interface, it has been pointed out that the Rashba spin-orbit interaction, the momentum-dependent spin
Mapping spin–charge conversion to the band structure in a topological oxide two-dimensional electron gas
A very large spin-to-charge conversion arising from a combination of the Rashba effect and topologically non-trivial states is realized at the interface of strontium titanate and aluminium, with implications for the role of topology in memory and transistor designs.
Theory of spin-orbit coupling at LaAlO 3 /SrTiO 3 interfaces and SrTiO 3 surfaces
The theoretical understanding of the spin-orbit coupling (SOC) effects at LaAlO$_{3}$/SrTiO$_{3}$ interfaces and SrTiO$_{3}$ surfaces is still in its infancy. We perform first-principles
Spin-to-charge conversion using Rashba coupling at the interface between non-magnetic materials.
This work presents experiments evidencing a large spin-charge conversion by the Bi/Ag Rashba interface and demonstrates that the Rashba effect at interfaces can be used for efficient charge-spin conversion in spintronics.