Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films

Abstract

We have synthesized epitaxial Sr2IrO4 thin-films on various substrates and studied their electronic structures as a function of lattice-strains. Under tensile (compressive) strains, increased (decreased) Ir-O-Ir bond-angles are expected to result in increased (decreased) electronic bandwidths. However, we have observed that the two optical absorption peaks near 0.5 eV and 1.0 eV are shifted to higher (lower) energies under tensile (compressive) strains, indicating that the electronic-correlation energy is also affected by in-plane lattice-strains. The effective tuning of electronic structures under lattice-modification provides an important insight into the physics driven by the coexisting strong spin-orbit coupling and electronic correlation.

arXiv comment9 pages, 5 figures, 1 table

References in corpus (7)

• Topological Insulators
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Bandwidth-Controlled Insulator-Metal Transition and Correlated Metallic State in 5$d$ Transition Metal Oxides Sr${}_{n+1}$Ir${}_n$O${}_{3n+1}$ ($n$=1, 2, and $\infty$)
• Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0\leqx\leq1)
• Magnetic couplings, optical spectra, and spin-orbit exciton in 5d electron Mott insulator Sr2IrO4
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• Pulsed laser deposition with simultaneous in situ real-time monitoring of optical spectroscopic ellipsometry and reflection high-energy electron diffraction

Cited by in corpus (51)

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• Tunable Semimetallic State in Compressive-strained SrIrO3 Films Revealed by Transport Behaviors
• Crossover of conduction mechanism in Sr2IrO4 epitaxial thin films
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• Tuning Magnetic Coupling in Sr${}_2$IrO${}_4$ Thin Films with Epitaxial Strain
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• Selective control of oxygen sublattice stability by epitaxial strain in Ruddlesden-Popper films
• Dimensionality-strain phase diagram of strontium iridates
• Latent Instabilities in Metallic LaNiO3 Films by Strain Control of Fermi-Surface Topology
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• Epitaxial thin films of pyrochlore iridate Bi_{2+x}Ir_{2-y}O_{7-delta}: structure, defects and transport properties
• Synthesis and electronic properties of Ruddlesden-Popper strontium iridate epitaxial thin films stabilized by control of growth kinetics
• The Jeff=1/2 antiferromagnet Sr2IrO4: A golden avenue toward new physics and functions
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• Electronic Structure and Magnetic Properties of Iridate Superlattice SrIrO${}_3$/SrTiO${}_3$
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• Substrate-tuning of correlated spin-orbit oxides
• Selective growth of epitaxial Sr2IrO4 by controlling plume dimensions in pulsed laser deposition
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• Persistent semi-metal-like nature of epitaxial perovskite CaIrO3 thin films
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• Epitaxial Ba2IrO4 thin-films grown on SrTiO3 substrates by pulsed laser deposition
• Optical Signatures of Spin-Orbit Exciton in Bandwidth Controlled Sr${}_2$IrO${}_4$ Epitaxial Films via High-Concentration Ca and Ba Doping
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• Ambipolar Transport and Magneto-resistance Crossover in a Mott Insulator, Sr${}_2$IrO${}_4$
• Investigations of metastable Ca2IrO4 epitaxial thin-films: systematic comparison with Sr2IrO4 and Ba2IrO4
• Nanoscale Sr${}_2$IrO${}_4$ Freestanding Thin-Films for Flexible Electronics
• Compressive-strain induced enhancement of exchange interactions and short-range magnetic order in Sr${}_2$IrO${}_4$ investigated by Raman spectroscopy
• Tuning the electronic structure of Sr2IrO4 thin films by bulk electronic doping using molecular beam epitaxy
• Non-collinear vs collinear description of the Ir-based one-$t_{2g}$ -hole perovskite-related compounds: SrIrO${}_3$ and Sr${}_2$IrO${}_4$
• Metal insulator transition and magnetotransport anomalies in perovskite SrIr0.5Ru0.5O3 thin films
• Crystal structure and physical properties of the Sr-vacant spin-orbit-coupling induced Mott insulator Sr2-xIrO4
• Metal-Insulator Transitions and non-Fermi Liquid Behaviors in 5d Perovskite Iridates
• Precise control of $J_{\mathrm{eff}}=1/2$ magnetic properties in Sr${}_2$IrO${}_4$ epitaxial thin films by variation of strain and thin film thickness
• Electronic and optical properties of La-doped Sr${}_3$Ir${}_2$O${}_7$ epitaxial thin-films
• Epitaxial stabilization of Sr3Ir2O7 thin films
• Structural, magnetic and dielectric properties in 3$d$-5$d$ based Sr${}_2$FeIrO${}_6$ thin films
• Evolution of electronic and magnetic properties of Sr${}_2$IrO${}_4$ under strain
• Evolution of electronic structure of Ru-doped single-crystal iridiates, Sr${}_2$Ir${}_{1-x}$Ru${}_x$O${}_4$
• Mixed-pairing superconductivity in 5d Mott insulators with antisymmetric exchange
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• Two dimensional electron gas in the $\delta$-doped iridates with strong spin-orbit coupling: La${}_{\delta }$Sr${}_2$IrO${}_4$