Quasihydrostatic versus nonhydrostatic pressure effects on the electrical properties of 
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Cui, Heping; Yun, Seohee; Lee, Kyeong Jun; Lee, Chanhyeon; Chang, Seo Hyoung; Lee, Yong Jae; Lee, Hyun Hwi; Kalaivanan, R.; Moovendaran, K.; Sankar, Raman; Choi, Kwang‐Yong

doi:10.1103/physrevmaterials.5.124008

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…More recent efforts combining transport and x-ray diffraction reveal a series of different crystal structures under pressure, time-dependent and somewhat sluggish character to several of the transitions, and an insulator-to-metal transition near 30 GPa (Matsuoka et al, 2021). Systematic studies of hydrostatic pressure vs. strain demonstrates that the critical pressure of the insulator-to metal transition (as identified by transport measurements) is reduced from 30 to 12.5 GPa under uniaxial strain (Cui et al, 2021) -an observation that again emphasizes the need for hydrostatic pressure conditions. This confusing and somewhat contradictory picture was resolved by bringing together synchrotron-based infrared absorption, Raman scattering, x-ray diffraction, and first-principles calculations under pressure to show that in fact NiPS 3 is quite different from the other MPS 3 materials (Harms et al, 2022a) with a series of five different critical pressures.…”

Section: Nips 3 and Nipsementioning

confidence: 99%

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

Matsuoka,

Kim,

Samanta

et al. 2024

Front. Mater.

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van der Waals antiferromagnets with chemical formula MPX3 (M = V, Mn, Fe, Co, Ni, Cd; X = S, Se) are superb platforms for exploring the fundamental properties of complex chalcogenides, revealing their structure-property relations and unraveling the physics of confinement. Pressure is extremely effective as an external stimulus, able to tune properties and drive new states of matter. In this review, we summarize experimental and theoretical progress to date with special emphasis on the structural, magnetic, and optical properties of the MPX3 family of materials. Under compression, these compounds host inter-layer sliding and insulator-to-metal transitions accompanied by dramatic volume reduction and spin state collapse, piezochromism, possible polar metal and orbital Mott phases, as well as superconductivity. Some responses are already providing the basis for spintronic, magneto-optic, and thermoelectric devices. We propose that strain may drive similar functionality in these materials.

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Section: Nips 3 and Nipsementioning

confidence: 99%

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

Matsuoka,

Kim,

Samanta

et al. 2024

Front. Mater.

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Emission Dipole and Pressure‐Driven Tunability of Second Harmonic Generation in vdWs Ferroelectric NbOI₂

Fu,

Yang,

Liu

et al. 2023

Adv Funct Materials

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Abstract2D in‐plane ferroelectric NbOI2 exhibits strong second harmonic generation (SHG) and ultrahigh effective susceptibility. To push forward their applications in nonlinear photonics and optoelectronics, it is highly desirable to understand the emission dipole orientation and tunability of SHG, which is not achieved. Here, by integrating tight focusing from parabolic mirror with back focal plane (BFP) imaging technique, for the first time it is demonstrated that SHG emission of NbOI2 presents purely in‐plane dipole orientation in consistent with numerical simulations, suggesting the in‐plane components of the SHG susceptibility tensor in NbOI2 dominate the emission. Moreover, with the aid of ab‐initio calculations, it is found that the hydrostatic pressure can dramatically change the structure and resultant SHG intensity of NbOI2. Explicitly, SHG intensity endures a slight increase due to the distortion of octahedral at low pressure pressure, and then monotonously decreases due to the improvement of structural symmetry with further increasing pressure, and drastically quenching resulting from the ferroelectric to paraelectric phase transition. This work unambiguously demonstrates the dipole emission behavior of SHG and the relationship between structural evolution and SHG intensity, which provides an avenue for tunable nonlinear optics and optoelectronics.

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Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS₃

Lee,

Choi

et al. 2024

Adv Funct Materials

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In van der Waals magnets, the interplay between magneto‐excitonic coupling and optical phenomena opens avenues for directly probing magnetic ordering structures, manipulating excitonic properties through magnetic fields, and exploring quantum entanglement between electronic and magnetic states. Notably, NiPS3 stands out for its capacity to host spin‐entangled excitons, where the excitonic states are intricately tied with the material's spin configuration. Herein, it is experimentally showcased that the spin‐entangled excitons can be utilized for detecting the magnetic easy axis in Ni1‐xMnxPS3 (x = 0–0.1). The end members of this series exhibit distinct magnetic ordering patterns and easy axes: zigzag ordering with magnetic moments aligned along the a‐axis for NiPS3 versus Néel ordering with the out‐of‐plane easy axis for MnPS3. By combining angle‐resolved exciton photoluminescence with magnetic susceptibility measurements, it is observed that the magnetic easy axis rotates away from the local spin chain direction with increasing Mn content. Moreover, through a comprehensive thermal and substitution study, it is demonstrated that the energy and lifetime of spin‐entangled excitons are governed by two spin‐flip processes and are drastically influenced by disparate electronic states. These findings not only provide optical means to map out magnetic ordering structures but also offer insights into decoherence processes in spin‐exciton entangled states.

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Quasihydrostatic versus nonhydrostatic pressure effects on the electrical properties of NiPS3

Cited by 4 publications

References 36 publications

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

Emission Dipole and Pressure‐Driven Tunability of Second Harmonic Generation in vdWs Ferroelectric NbOI₂

Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS₃

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Quasihydrostatic versus nonhydrostatic pressure effects on the electrical properties of NiPS3

Cited by 4 publications

References 36 publications

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

MPX3 van der Waals magnets under pressure (M = Mn, Ni, V, Fe, Co, Cd; X = S, Se)

Emission Dipole and Pressure‐Driven Tunability of Second Harmonic Generation in vdWs Ferroelectric NbOI2

Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS3

Contact Info

Product

Resources

About

Emission Dipole and Pressure‐Driven Tunability of Second Harmonic Generation in vdWs Ferroelectric NbOI₂

Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS₃