Giant stress response of terahertz magnons in a spin-orbit Mott insulator

Kim, Hun-ho; Ueda, Kentaro; Nakata, S.; Wochner, P.; Mackenzie, A. P.; Hicks, Clifford W.; Khaliullin, Giniyat; Liu, Huimei; Keimer, B.; Minola, M.

doi:10.1038/s41467-022-34375-6

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…This behavior enables electrically controllable and electronically detectable metamagnetic switching despite the AFM insulating state. Meanwhile, the application of a 0.1% anisotropic strain increases the magnon energy of Sr 2 IrO 4 by 40%, possibly opening up multifold design options for reconfigurable magnonic devices [22].…”

Section: Magnetism Probed By Resonant Magnetic Scattering In the Irid...mentioning

confidence: 99%

“…The anisotropic strain cell is presently being incorporated with an increasing number of techniques, such as Raman spectroscopy [22], nuclear magnetic resonance (NMR) [23], and angle-resolved photoemission spectroscopy [24]. The applied elastic strain is usually monitored by measuring the sample deformation via a strain gage, which is usually a foil gage or a high-precision capacitor.…”

Section: Introductionmentioning

confidence: 99%

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Perspective: probing elasto-quantum materials with x-ray techniques and in situ anisotropic strain

Zhang,

Sanchez,

Chu

et al. 2024

J. Phys.: Condens. Matter

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Anisotropic lattice deformation plays an important role in the quantum mechanics of solid state physics. The possibility of mediating the competition and cooperation among different order parameters by applying in situ strain/stress on quantum materials has led to discoveries of a variety of elasto-quantum effects on emergent phenomena. It has become increasingly critical to have the capability of combining the in situ strain tuning with X-ray techniques, especially those based on synchrotrons, to probe the microscopic elasto-responses of the lattice, spin, charge, and orbital degrees of freedom. Herein, we briefly review the recent studies that embarked on utilizing elasto-X-ray characterizations on representative material systems and demonstrated the emerging opportunities enabled by this method. With that, we further discuss the promising prospect in this rising area of quantum materials research and the bright future of elasto-X-ray techniques.

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Section: Magnetism Probed By Resonant Magnetic Scattering In the Irid...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Perspective: probing elasto-quantum materials with x-ray techniques and in situ anisotropic strain

Zhang,

Sanchez,

Chu

et al. 2024

J. Phys.: Condens. Matter

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Spin–phonon interactions and magnetoelectric coupling in Co4B2O9 (B = Nb, Ta)

Park

Kim

Choi

et al. 2023

Applied Physics Letters

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In order to explore the consequences of spin–orbit coupling on spin–phonon interactions in a set of chemically similar mixed metal oxides, we measured the infrared vibrational properties of Co4B2O9 (B = Nb, Ta) as a function of temperature and compared our findings with lattice dynamics calculations and several different models of spin–phonon coupling. Frequency vs temperature trends for the Co2+ shearing mode near 150 cm−1 reveal significant shifts across the magnetic ordering temperature that are especially large in relative terms. Bringing these results together and accounting for noncollinearity, we obtain spin–phonon coupling constants of −3.4 and −4.3 cm−1 for Co4Nb2O9 and the Ta analog, respectively. Analysis reveals that these coupling constants are derived from interlayer (rather than intralayer) exchange interactions and that the interlayer interactions contain competing antiferromagnetic and ferromagnetic contributions. At the same time, beyond-Heisenberg terms are minimized due to fortuitous symmetry considerations, different from most other 4d- and 5d-containing oxides. Comparison with other contemporary oxides shows that spin–phonon coupling in this family of materials is among the strongest ever reported, suggesting an origin for magnetoelectric coupling.

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Perspective on antiferromagnetic iridates for spintronics

Yang

Zhang

et al. 2023

APL Materials

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Antiferromagnetic (AFM) iridates are recently discovered to be a fertile playground for exploring emergent phenomena relevant to the intriguing interplay among multiple degrees of freedom, such as strong spin–orbit coupling, electron correlation, and the crystal field effect. These phenomena offer interesting routes for probing as well as controlling AFM order in iridate, which is essential in AFM spintronics. In this perspective, we will briefly review recent studies on AFM iridates that host large potential for advancing the reading (anisotropic magnetoresistance effect, etc.) and writing (magnetic field control of AFM order, etc.) functionalities of AFM spintronics. We will also discuss promising directions for expanding the research of AFM iridate based spintronics from the perspectives of material growth, manipulation protocol, and characterization technique.

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Giant stress response of terahertz magnons in a spin-orbit Mott insulator

Cited by 6 publications

References 45 publications

Perspective: probing elasto-quantum materials with x-ray techniques and in situ anisotropic strain

Perspective: probing elasto-quantum materials with x-ray techniques and in situ anisotropic strain

Spin–phonon interactions and magnetoelectric coupling in Co4B2O9 (B = Nb, Ta)

Perspective on antiferromagnetic iridates for spintronics

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