# Magnetic excitations in hole-doped Sr2IrO4 : Comparison with electron-doped cuprates

@article{Clancy2019MagneticEI,
title={Magnetic excitations in hole-doped
Sr2IrO4
: Comparison with electron-doped cuprates},
author={J. Patrick Clancy and Hlynur Gretarsson and Mary H. Upton and Jungho Kim and Guixin Cao and Young-June Kim},
journal={Physical Review B},
year={2019}
}
We have studied the evolution of magnetic and orbital excitations as a function of hole-doping in single crystal samples of Sr2Ir(1-x)Rh(x)O4 (0.07 < x < 0.42) using high resolution Ir L3-edge resonant inelastic x-ray scattering (RIXS). Within the antiferromagnetically ordered region of the phase diagram (x < 0.17) we observe highly dispersive magnon and spin-orbit exciton modes. Interestingly, both the magnon gap energy and the magnon bandwidth appear to increase as a function of doping… Expand
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#### References

SHOWING 1-10 OF 57 REFERENCES
Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4
• Physics
• 2017
The simultaneous presence of sizable spin-orbit interactions and electron correlations in iridium oxides has led to predictions of novel ground states including Dirac semimetals, Kitaev spin liquids,Expand
Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1−xRhxO4(0≤x≤1)
Sr₂IrO₄ is a magnetic insulator driven by spin-orbit interaction (SOI) whereas the isoelectronic and isostructural Sr₂RhO₄ is a paramagnetic metal. The contrasting ground states have been shown toExpand
Observation of a d-wave gap in electron-doped Sr2IrO4
• Physics
• 2016
Sr2IrO4 bears a striking electronic resemblance to the cuprate superconductors, except the iridate is an insulator. Introducing electrons into Sr2IrO4 leads to a d-wave gap, suggestingExpand
Correlation induced electron-hole asymmetry in quasi- two-dimensional iridates
• Physics, Medicine
• Nature Communications
• 2017
It is shown that there is significant electron-hole asymmetry in iridates, contrary to expectations from the cuprates, which demonstrates that correlation physics renders electron- and hole-doped iridates fundamentally different. Expand
Persistence of magnetic excitations in La(2-x)Sr(x)CuO4 from the undoped insulator to the heavily overdoped non-superconducting metal.
One of the most intensely studied scenarios of high-temperature superconductivity (HTS) postulates pairing by exchange of magnetic excitations. Indeed, such excitations have been observed up toExpand
High-energy spin and charge excitations in electron-doped copper oxide superconductors.
X-ray and neutron inelastic X-ray scattering spectra show that magnetic excitations shift to higher energy upon doping, and they deeply mix with charge excitations, indicating that electrons acquire a highly itinerant character in the doped metallic state. Expand
Crystal-field splitting and correlation effect on the electronic structure of A2IrO3.
The electronic structure of the honeycomb lattice iridates Na(2)IrO(3) and Li(2), which have been investigated using resonant inelastic x-ray scattering (RIXS), suggest that both can be described as spin-orbit Mott insulators, similar to the square lattice IrO(4). Expand
Insight on the electronic state of Sr2IrO4 revealed by cationic substitutions
• Physics
• 2008
We report the electrical resistivity, thermoelectric power and magnetization of Sr2−xLaxIrO4 (x = 0 and 0.05) and Sr2Ir1−yRhyO4 (y = 0.05, 0.1 and 0.2) measured below room temperature. In Sr2IrO4,Expand
Magnetic excitation spectra of Sr2IrO4 probed by resonant inelastic x-ray scattering: establishing links to cuprate superconductors.
We used resonant inelastic x-ray scattering to reveal the nature of magnetic interactions in Sr2IrO4, a 5d transition-metal oxide with a spin-orbit entangled ground state and J(eff)=1/2 magneticExpand
Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering.
It is shown that RIXS at the Cu L3-edge indeed provides access to the spin dynamical structure factor once one considers the full influence of light polarization, and it is demonstrated that high-energy spin excitations do not correlate with the doping dependence of Tc, while low-energy excitations depend sensitively on doping and show ferromagnetic correlations. Expand