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Klein, Yannick; Rousse, Gwenaëlle; Damay, F.; Porcher, F.; André, G.; Terasaki, Ichiro

doi:10.1103/physrevb.84.054439

Cited by 28 publications

(36 citation statements)

References 28 publications

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“…The thermopower also shows an anomaly near T c , below which it rapidly enhances with decreasing temperatures. As Kini et al pointed out [14], this is a clear indication of the charge gap in the density of states [21,22], strongly indicating an insulating nature below T c . The thermopower takes a broad maximum near 100 K, and goes towards zero with decreasing temperature.…”

Section: Methodsmentioning

confidence: 82%

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

et al. 2016

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Abstract:We have prepared polycrystalline samples of the trimer Ir oxide BaIrO 3 with face-shared Ir 3 O 12 trimers, and have investigated the origin of the phase transition at 182 K by measuring resistivity, thermopower, magnetization and synchrotron X-ray diffraction. We propose a possible electronic model and transition mechanism, starting from a localized electron picture on the basis of the Rietveld refinement. Within this model, BaIrO 3 can be basically regarded as a Mott insulator, when the Ir 3 O 12 trimer is identified to one pseudo-atom or one lattice site. The transition can be viewed as a transition from the Mott insulator phase to a kind of charge ordered insulator phase.

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Section: Methodsmentioning

confidence: 82%

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

et al. 2016

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“…17,18 Ba 4 Ru 3 O 10 shows a para- magnetic metal-antiferromagnetic insulator transition at 105 K without translational symmetry breaking. 19 La 4 Ru 2 O 10 shows a peculiar orbital ordering revealed by neutron scattering. 20 Among various ruthenium oxides, we have focused on Li 2 RuO 3 .…”

Section: Introductionmentioning

confidence: 98%

Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li₂RuO₃

et al. 2015

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Ruthenium oxides are typical strongly correlated electron systems, where various ordering phenomena occur through delicate interplay among the charge, spin and orbital degrees of freedom. We propose that the thermoelectric properties can be improved by controlling such ordered phases in strongly correlated electron systems. The honeycomb Ru oxide Li 2 RuO 3 is a prime example that exhibits a unique phase transition at 540 K with a charge gap. We have found that the ordered state can be modified by substituting Ru site partially, and succeeded in increasing the thermopower with keeping the resistivity around the same value to enhance the power factor substantially.

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“…This tendency follows the trend of the ferromagnetic transition temperature ( T c ), which is discussed as follows (Figure 2c). We note that the hybridization strength determining the magnetic ground state can be further applied to other BaRuO systems, [ 32,33 ] in addition to the various BaRuO 3 polymorphs.…”

Section: Figurementioning

confidence: 99%

Epitaxial Stabilization of Metastable 3C BaRuO₃ Thin Film with Ferromagnetic Non‐Fermi Liquid Phase

Lee

et al. 2021

Adv Elect Materials

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Thin films of perovskite ruthenates of the general formula ARuO3 (A = Ca and Sr) are versatile electrical conductors for viable oxide electronics. They are also scientifically intriguing, as they exhibit nontrivial electromagnetic ground states depending on the A‐site element. Among them, realization of the cubic perovskite (3C) BaRuO3 in thin film form has been a challenge so far, because the 3C phase is metastable with the largest formation energy among the various polymorph phases of BaRuO3. In this study, 3C BaRuO3 thin films are successfully prepared employing epitaxial stabilization. The 3C BaRuO3 thin films show itinerant ferromagnetism with a transition temperature of ≈48 K and a non‐Fermi liquid phase. The epitaxial stabilization of the 3C BaRuO3 further enables to make a standard comparison of perovskite ruthenates, thereby establishing the importance of the RuO orbital hybridization in understanding the itinerant magnetic system.

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Antiferromagnetic order and consequences on the transport properties of Ba4Ru3

Cited by 28 publications

References 28 publications

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li₂RuO₃

Epitaxial Stabilization of Metastable 3C BaRuO₃ Thin Film with Ferromagnetic Non‐Fermi Liquid Phase

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Antiferromagnetic order and consequences on the transport properties of Ba4Ru3

Cited by 28 publications

References 28 publications

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li2RuO3

Epitaxial Stabilization of Metastable 3C BaRuO3 Thin Film with Ferromagnetic Non‐Fermi Liquid Phase

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Product

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Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li₂RuO₃

Epitaxial Stabilization of Metastable 3C BaRuO₃ Thin Film with Ferromagnetic Non‐Fermi Liquid Phase