# Pseudo-spin rotation symmetry breaking by Coulomb interaction terms in spin-orbit coupled systems.

@article{Mohapatra2020PseudospinRS,
title={Pseudo-spin rotation symmetry breaking by Coulomb interaction terms in spin-orbit coupled systems.},
author={Shubhajyoti Mohapatra and Avinash Singh},
journal={Journal of physics. Condensed matter : an Institute of Physics journal},
year={2020}
}
• Published 1 January 2020
• Physics, Medicine
• Journal of physics. Condensed matter : an Institute of Physics journal
By transforming from the real-spin-orbital $t_{\rm 2g}$ basis to the spin-orbital entangled pseudo-spin-orbital basis, the pseudo-spin rotation symmetry of the different Coulomb interaction terms is investigated under SU(2) transformation in pseudo-spin space. While the Hubbard and density interaction terms are invariant and therefore preserve spin rotation symmetry, the Hund's coupling and pair-hopping interaction terms explicitly break pseudo-spin rotation symmetry systematically…
3 Citations

## Figures and Tables from this paper

Coupled spin–orbital fluctuations in a three orbital model for 4d and 5d oxides with electron fillings n = 3, 4, 5—application to NaOsO3, Ca2RuO4 and Sr2IrO4
• Physics, Medicine
Journal of physics. Condensed matter : an Institute of Physics journal
• 2021
The characteristic features of the coupled spin–orbital excitations are related to the complex magnetic behavior resulting from the interplay between electronic bands, spin–orbit coupling, Coulomb interactions, and structural distortion effects, as realized in the compounds NaOsO3, Ca2RuO4, and Sr2IrO4.
Magnetic reorientation transition in a three orbital model for {\boldmath $\rm Ca_2 Ru O_4$} --- Interplay of spin-orbit coupling, tetragonal distortion, and Coulomb interactions.
• Physics, Medicine
Journal of physics. Condensed matter : an Institute of Physics journal
• 2020
This investigation yields a planar antiferromagnetic (AFM) order for moderate tetragonal distortion, with easy $a-b$ plane and easy $b$ axis anisotropies, along with small canting of the dominantly $yz,xz$ orbital moments.

## References

SHOWING 1-10 OF 31 REFERENCES
Correlated motion of particle-hole excitations across the renormalized spin-orbit gap in Sr2IrO4
• Physics
• 2020
Abstract The high-energy collective modes of particle-hole excitations across the spin-orbit gap in Sr 2 IrO 4 are investigated using the transformed Coulomb interaction terms in the
Magnetic reorientation transition in a three orbital model for {\boldmath $\rm Ca_2 Ru O_4$} --- Interplay of spin-orbit coupling, tetragonal distortion, and Coulomb interactions.
• Physics, Medicine
Journal of physics. Condensed matter : an Institute of Physics journal
• 2020
This investigation yields a planar antiferromagnetic (AFM) order for moderate tetragonal distortion, with easy $a-b$ plane and easy $b$ axis anisotropies, along with small canting of the dominantly $yz,xz$ orbital moments.
Magnetism in iridate heterostructures leveraged by structural distortions
• D. Meyers, +18 authors M. Dean
• Materials Science, Medicine
Scientific Reports
• 2019
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.
Octahedral tilting induced isospin reorientation transition in iridate heterostructures
• Physics
Physical Review B
• 2019
Iridate heterostructures are gaining interest as their magnetic properties are much more sensitive to structural distortion compared to pure spin systems due to spin-orbital entanglement induced by
Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4
Spin-orbit entangled magnetic dipoles, often referred to as pseudospins, provide a new avenue to explore novel magnetism inconceivable in the weak spin-orbit coupling limit, but the nature of their
Square Lattice Iridates
• Physics
Annual Review of Condensed Matter Physics
• 2019
Over the past few years, Sr2IrO4, a single-layer member of the Ruddlesden–Popper series iridates, has received much attention as a close analog of cuprate high-temperature superconductors. Although
• J. Phys.: Condens. Matter
• 2017
Anisotropic exchange and spin-wave damping in pure and electron-doped Sr_2IrO_4
The collective magnetic excitations in the spin-orbit Mott insulator (Sr_(1−x)La_x)_2IrO_4 (x=0, 0.01, 0.04, 0.1) were investigated by means of resonant inelastic x-ray scattering. We report
Correlation Effects and Hidden Spin-Orbit Entangled Electronic Order in Parent and Electron-Doped Iridates Sr 2 IrO 4
• Physics
• 2017
Analogs of the high-T-c cuprates have been long sought after in transition metal oxides. Because of the strong spin-orbit coupling, the 5d perovskite iridates Sr2IrO4 exhibit a low-energy electronic
Coulomb correlations in 4d and 5d oxides from first principles-or how spin-orbit materials choose their effective orbital degeneracies.
• Physics, Medicine
Journal of physics. Condensed matter : an Institute of Physics journal
• 2017
Recent advances in dynamical mean-field theory (DMFT)-based electronic structure calculations for treating 4d and 5d transition metal oxides, like iridates or rhodates are reviewed, introducing all necessary implementation details and introducing the notion of effective spin-orbital degeneracy.