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Korneta, O. B.; Qi, Tongfei; Saito, Chikara; Parkin, Sean; Long, L. E. De; Schlottmann, P.; Cao, Gang

doi:10.1103/physrevb.82.115117

Cited by 123 publications

(117 citation statements)

References 17 publications

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“…Specifically, electrondoping via La-substitution was reported to stabilize a low temperature metallic-state at 4% La-substitution, and the creation of oxygen vacancies was also reported to form a low temperature metallic state 27 -although chemical inhomogeneity inherent to limited oxygen diffusion precludes an in depth study of the latter. The means through which this metal-insulator (MIT) occurs and the evolution of electronic degrees of freedom as the SOM state is destroyed remain important open questions and are the focus of the present work.…”

Section: Introductionmentioning

confidence: 99%

Influence of electron doping on the ground state of(Sr1−xLax)2IrO4

et al. 2015

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The evolution of the electronic properties of electron-doped (Sr1−xLax)2IrO4 is experimentally explored as the doping limit of La is approached. As electrons are introduced, the electronic ground state transitions from a spin-orbit Mott phase into an electronically phase separated state, where long-range magnetic order vanishes beyond x = 0.02 and charge transport remains percolative up to the limit of La substitution (x ≈ 0.06). In particular, the electronic ground state remains inhomogeneous even beyond the collapse of the parent state's long-range antiferromagnetic order, while persistent short-range magnetism survives up to the highest La-substitution levels. Furthermore, as electrons are doped into Sr2IrO4, we observe the appearance of a low temperature magnetic glass-like state intermediate to the complete suppression of antiferromagnetic order. Universalities and differences in the electron-doped phase diagrams of single layer and bilayer Ruddlesden-Popper strontium iridates are discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of electron doping on the ground state of(Sr1−xLax)2IrO4

et al. 2015

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“…4,29,[36][37][38] For example, doping Mn results in an spin-flop transition with moments aligning along the c-axis. 36 The remaining J eff = 1/2 state revealed by RXS measurement suggests its robustness against the alternation of spin structure.…”

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confidence: 99%

Magnetic and crystal structures ofSr2IrO4: A neutron diffraction study

et al. 2013

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We report a single-crystal neutron diffraction study of the layered Sr2IrO4. This work unambiguously determines the magnetic structure of the system and reveals that the spin orientation rigidly tracks the staggered rotation of the IrO6 octahedra in Sr2IrO4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) µB/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) µB/site for the a axis and the b axis, respectively. It is intriguing that forbidden nuclear reflections of space group I41/acd are also observed in a wide temperature range from 4 K to 600 K, which suggests a reduced crystal structure symmetry. This neutron-scattering work provides a direct, well-refined experimental characterization of the magnetic and crystal structures that are crucial to the understanding of the unconventional magnetism exhibited in this unusual magnetic insulator.

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“…Since the valency of the Ir ions is 4+, there are five electrons for the Ir 5d orbitals. Due to the crystal-field splitting in the IrO 6 octahedron, the Ir 5d bands are divided into two bands, t 2g and e g bands. The strong spin-orbit coupling further splits the t 2g bands into fourfold-degenerate J eff,3/2 and doubly-degenerate J eff,1/2 [4,14,22,23].…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, a plethora of perplexing phenomena have been discovered in 5d iridates such as a weakly correlated Mott state with magnetic instability [4], metal-insulator transition [5][6][7], charge density instability [8].…”

Section: Introductionmentioning

confidence: 99%

Infrared study of the electronic structure of the metallic pyrochlore iridate Bi2Ir2O7

et al. 2013

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We investigated the electronic properties of a single crystal of metallic pyrochlore iridate Bi 2 Ir 2 O 7 by means of infrared spectroscopy. Our optical conductivity data show the splitting of t 2g bands into J eff ones due to strong spin-orbit coupling. We observed a sizable mid-infrared absorption near 0.2 eV which can be attributed to the optical transition within the J eff,1/2 bands.More interestingly, we found an abrupt suppression of optical conductivity in the very farinfrared region. Our results suggest that the electronic structure of Bi 2 Ir 2 O 7 is governed by the 2 strong spin-orbit coupling and correlation effects, which are prerequisite for theoretically proposed non-trivial topological phases in pyrochlore iridates.PACS number: 78.20.-e, 71.30.+h, 71.20.-b 3

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Electron-dopedSr2IrO4−δ(0≤

Cited by 123 publications

References 17 publications

Influence of electron doping on the ground state of(Sr1−xLax)2IrO4

Influence of electron doping on the ground state of(Sr1−xLax)2IrO4

Magnetic and crystal structures ofSr2IrO4: A neutron diffraction study

Infrared study of the electronic structure of the metallic pyrochlore iridate Bi2Ir2O7

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