Spin-liquid behavior of the three-dimensional magnetic system 
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Kumar, Siddharth; Panda, S. K.; Patidar, Manju Mishra; Ojha, Shashank Kumar; Mandal, Prithwijit; Das, Gangadhar; Freeland, J. W.; Ganesan, V.; Baker, Peter J.; Middey, S.

doi:10.1103/physrevb.103.184405

Phys. Rev. B

2021

DOI: 10.1103/physrevb.103.184405

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Spin-liquid behavior of the three-dimensional magnetic system Ba3NiIr2O9 with S=1

Siddharth Kumar

S. K. Panda

Manju Mishra Patidar

et al.

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Cited by 8 publications

References 68 publications

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Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

De,

Kurian,

Solaiappan

et al. 2024

Chem. Mater.

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Triple perovskites have garnered research interest in recent years because of their diverse physical properties. This review article delves into the significance of triple perovskite oxides, an important variant of ABO 3 -type perovskites. It provides a comprehensive overview of recent advancements in understanding these A 3 B 3 O 9 /A 3 BB 2 ′O 9 oxide materials, emphasizing their chemical structure and its interplay with diverse properties such as magnetic and electric behaviors. A new framework is proposed to distinguish these functional materials from the other perovskite variants. In addition, the article explores potential technical applications including renewable energy devices, thermistors, optoelectronics, and triboelectric nanogenerators within the perovskite family.

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Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

De,

Kurian,

Solaiappan

et al. 2024

Chem. Mater.

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Quasimolecular electronic structure of the spin-liquid candidate Ba3InIr2O9

et al. 2022

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The mixed-valent iridate Ba 3 InIr 2 O 9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir 4.5+ ions in face-sharing IrO 6 octahedra forming Ir 2 O 9 dimers with three t 2g holes per dimer. Our results establish Ba 3 InIr 2 O 9 as a cluster Mott insulator. Strong intradimer hopping delocalizes the three t 2g holes in quasimolecular dimer states while interdimer charge fluctuations are suppressed by Coulomb repulsion. The magnetism of Ba 3 InIr 2 O 9 emerges from spin-orbit entangled quasimolecular moments with yet unexplored interactions, opening up a new route to unconventional magnetic properties of 5d compounds. Using single-crystal x-ray diffraction we find the monoclinic space group C2/c already at room temperature. Dielectric spectroscopy shows insulating behavior. Resonant inelastic x-ray scattering reveals a rich excitation spectrum below 1.5 eV with a sinusoidal dynamical structure factor that unambiguously demonstrates the quasimolecular character of the electronic states. Below 0.3 eV, we observe a series of excitations. According to exact diagonalization calculations, such low-energy excitations reflect the proximity of Ba 3 InIr 2 O 9 to a hopping-induced phase transition based on the condensation of a quasimolecular spin-orbit exciton. The dimer ground state roughly hosts two holes in a bonding j = 1 2 orbital and the third hole in a bonding j = 3 2 orbital.

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Disorder-driven cluster glass state in a geometrically frustrated hexagonal perovskite

et al. 2023

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Spin-liquid behavior of the three-dimensional magnetic system Ba3NiIr2O9 with S=1

Cited by 8 publications

References 68 publications

Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

Quasimolecular electronic structure of the spin-liquid candidate Ba3InIr2O9

Disorder-driven cluster glass state in a geometrically frustrated hexagonal perovskite

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