Absence of mixed valency for Pr in pristine and hole-doped 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>PrNiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Liao, Xingyu; Norman, M. R.; Park, Hyowon

doi:10.1103/physrevb.107.165153

Phys. Rev. B

2023

DOI: 10.1103/physrevb.107.165153

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Absence of mixed valency for Pr in pristine and hole-doped PrNiO2

Xingyu Liao

M. R. Norman

Hyowon Park

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Cited by 2 publications

References 33 publications

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Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Zhang

et al. 2023

Adv Funct Materials

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The discovery of superconductivity in hole‐doped infinite‐layer nickelates has fueled intense research to identify the critical factor responsible for high‐Tc superconductivity. Magnetism and superconductivity are closely entangled, and elucidating the magnetic interactions in hole‐doped nickelates is critical for understanding the pairing mechanism. Here, these calculations based on the generalized Bloch theorem (GBT) and magnetic force theorem (MFT) consistently reveal that hole doping stabilizes an incommensurate (IC) spin state and increases the IC wave vector continuously, in a way strikingly similar to hole‐doped cuprates. Going further, a nonlinear Heisenberg model including first‐neighbor and third‐neighbor in‐plane magnetic interactions is developed. The analytical solutions successfully reproduce GBT and MFT results and reveal that the competition between the two magnetic interactions is the decisive factor for the IC magnetic transition. Eventually, by analyzing the doping‐controlled spin splitting of band and orbital‐contributed exchange interactions, direct links between hole doping, magnetization, exchange constants, and magnetic order are established. This discovery of the IC spin state, new understanding of its electronic origin, and establishment of direct connection with the paring electrons radically change the current understanding of the magnetic properties in hole‐doped NdNiO2 and open new perspectives for the superconducting mechanism in nickelates superconductors.

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Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Zhang

et al. 2023

Adv Funct Materials

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Elucidating correlation-driven insulating state in an effective spin—½ antiferromagnet NdVO₄

Ranaut,

Sihi,

Saravanan

et al. 2024

J. Phys.: Condens. Matter

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The Jeff = ½ state: a result of interplay of strong electronic correlations (U) with spin-orbit coupling (SOC) and crystal field splitting, offers a platform in the research of quantum materials. In this context, 4f rare-earth based materials offer a fertile playground. Here, strong experimental and theoretical evidences for a Jeff = ½ state is established in a 3D spin system NdVO4. Magnetic measurements show the signatures of a SOC driven Jeff = ½ state along with the presence of antiferromagnetic (AFM) interaction between Nd3+ moments, whereas, heat capacity reveals the presence of an AFM ordering around 0.8 K, within this state. An entropy of Rln2 (equivalent to J = ½) is released around 4 K which implies the presence of Jeff = ½ state at low temperatures. Total energy calculations within the DFT framework reflect the central role of SOC in driving the Nd3+ ions to host such a state with AFM correlations between them, which is in agreement with experimental results. Further, DFT + SOC calculations with and without the inclusion of U, points that electron-electron correlations give rise to the insulating state making NdVO4 a potential candidate for U-driven correlated Mott insulator.

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Absence of mixed valency for Pr in pristine and hole-doped PrNiO2

Cited by 2 publications

References 33 publications

Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Elucidating correlation-driven insulating state in an effective spin—½ antiferromagnet NdVO₄

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Absence of mixed valency for Pr in pristine and hole-doped PrNiO2

Cited by 2 publications

References 33 publications

Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Incommensurate Magnetic Order in Hole‐Doped Infinite‐Layer Nickelate Superconductors due to Competing Magnetic Interactions

Elucidating correlation-driven insulating state in an effective spin—½ antiferromagnet NdVO4

Contact Info

Product

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About

Elucidating correlation-driven insulating state in an effective spin—½ antiferromagnet NdVO₄