Tuning valley splitting and magnetic anisotropy of multiferroic 
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Zhang, Dehe; Li, Aolin; Chen, Xincheng; Zhou, Wenzhe; Ouyang, Fangping

doi:10.1103/physrevb.105.085408

Cited by 25 publications

(8 citation statements)

References 43 publications

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“…In such a way the Dirac Fermions’ bands around the Fermi level can be produced in the initially AFM insulator CrPSe 3 via alloying with Zn, Cd, and Hg . In the case of CuMP 2 X 6 (M: Cr, V), the multiferroic behavior was found, and for CuCrP 2 S 6 the new magnetic-field-induced ferroelectricity and associated magnetoelectric effects below its Néel temperature of 32 K were recently discovered . Further development of this concept led very recently to the synthesis of high entropy van der Waals MPX 3 -based materials that can allow creating novel catalysts with enhanced performance in many chemical reactions. − Substitution of M ions by other ones allows precise tuning of the magnetic properties; for example, for Fe 1– x Ni x PS 3 it was found that small concentration of Fe (≈10%) switches an XXZ anisotropy to an Ising-like one. , However, the full understanding of the observed phenomena and the mechanism of such abrupt behavior are not clear, lacking the systematic studies of the electronic structure of these complex alloyed systems.…”

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confidence: 99%

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Yan

Jin

et al. 2022

J. Phys. Chem. Lett.

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The electronic structure of the alloyed transition-metal phosphorus trichalcogenide van der Waals Fe1–x Ni x PS3 compounds is studied using X-ray absorption spectroscopy and resonant photoelectron spectroscopy combined with intensive density functional theory calculations. Our systematic spectroscopic and theoretical data demonstrate the strong localization of the Fe- and Ni-ions-derived electronic states that leads to the description of the spectroscopic data as belonging simultaneously to Mott–Hubbard and charge-transfer insulators. These findings reveal Fe1–x Ni x PS3 as unique layered compounds with dual character of the insulating state, pointing to the importance of these results for the description and understanding of the functionality of this class of materials in different applications.

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confidence: 99%

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Yan

Jin

et al. 2022

J. Phys. Chem. Lett.

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“…Motivated by these challenges, based on first-principles calculations with DFT+U approach and strained k • p model, [37] we have predicted single-layer (SL) RuCl 2 as an FV semiconductor, exhibiting intrinsic FM order and giant spontaneous valley polarization. Interestingly, we found that different electronic correlation strengths (U) and strains (ε) [41][42][43][44] make SL-RuCl 2 transition to different valley-controllable electronic states, including FV to half-valley [45] semimetal (HVS) to QAVHE to HVS to FV state. These different electronic states are connected with valley-controllable signreversible Berry curvature.…”

Section: Introductionmentioning

confidence: 98%

Design of sign-reversible Berry phase effect in 2D magneto-valley material

Han

Yang

et al. 2023

Chinese Phys. B

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Manipulating sign-reversible Berry phase effects is both fundamentally intriguing and practically appealing for searching for exotic topological quantum states. However, the realization of multiple Berry phases in the magneto-valley lattice is rather challenging due to the complex interactions from spin-orbit coupling, band topology, and magnetic ordering. Here, taking single-layer spin-valley RuCl2 as an example, we find that sign-reversible Berry phase transitions from ferrovalley (FV) to half-valley semimetal (HVS) to quantum anomalous valley Hall effect (QAVHE) can be achieved via tuning electronic correlation effect or biaxial strains. Remarkably, QAVHE phase, which combines both the features of quantum anomalous Hall and anomalous Hall valley effect, is introduced by sign-reversible Berry curvature or band inversion of d xy /d x 2-y 2 and d z 2 orbitals at only one of the K/K' valleys of single-layer RuCl2. And the boundary of QAVHE phase is the HVS state, which can achieve 100% intrinsically valley polarization. Further, a k·p model unveiled the valley-controllable sign-reversible Berry phase effects. These discoveries establish RuCl2 as a promising candidate to explore exotic quantum states at the confluence of nontrivial topology, electronic correlation, and valley degree of freedom.

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“…Multiferroics are defined as materials that exhibit two or more primary ferroic features in a single phase, including ferromagnetic/antiferromagnetic (FM/AFM), ferroelectric/antiferroelectric (FE/AFE), ferroelastic orders, etc. − Among them, magnetoelectric materials, displaying both long-range polarity and magnetic orders, are arguably the most studied multiferroic materials. A number of materials with intrinsic multiferroicity have been synthesized experimentally and predicted theoretically, such as Sr 3 Co 2 Fe 24 O 41, BiTiO 3 , CuFe 2 O 4 , etc., which hold promising applications for multifunctional devices for low-power, high-density, nonvolatile data storage, sensors, energy harvesting, actuators, etc.…”

Section: Introductionmentioning

confidence: 99%

Coexistence of Ferromagnetism and Ferroelectricity in Cu-Intercalated Bilayer CrI₃

Qian,

Wang,

et al. 2024

ACS Omega

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Design of two-dimensional (2D) multiferroic materials with two or more ferroic orders in one structure is highly desired in view of the development of next-generation electronic devices. Unfortunately, experimental or theoretical discovery of 2D intrinsic multiferroic materials is rare. Using first-principles calculation methods, we report the realization of multiferroics that couple ferromagnetism and ferroelectricity by intercalating Cu atoms in bilayer CrI3, Cu x @bi-CrI3 (x = 0.03, 0.06, and 0.25). Our results show that the intercalation of Cu atoms leads to the inversion symmetry breaking of bilayer CrI3 and produces intercalation density-dependent out-of-plane electric polarization, around 18.84–90.31 pC·cm–2. Moreover, the switch barriers of Cu x @bi-CrI3 in both polarization states are small, ranging from 0.31 to 0.69 eV. Furthermore, the magnetoelectric coupling properties of Cu x @bi-CrI3 can be modulated via varying the metal ion intercalation density, and half-metal to semiconductor transition can be occurred by decreasing the intercalation density of metal ions. Our work paves a practical path for 2D magnetoelectron coupling devices.

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Tuning valley splitting and magnetic anisotropy of multiferroic CuMP2X6 (M=Cr,V;

Cited by 25 publications

References 43 publications

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Design of sign-reversible Berry phase effect in 2D magneto-valley material

Coexistence of Ferromagnetism and Ferroelectricity in Cu-Intercalated Bilayer CrI₃

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Tuning valley splitting and magnetic anisotropy of multiferroic CuMP2X6 (M=Cr,V;

Cited by 25 publications

References 43 publications

Dual Character of the Insulating State in the van der Waals Fe1–xNixPS3 Alloyed Compounds

Dual Character of the Insulating State in the van der Waals Fe1–xNixPS3 Alloyed Compounds

Design of sign-reversible Berry phase effect in 2D magneto-valley material

Coexistence of Ferromagnetism and Ferroelectricity in Cu-Intercalated Bilayer CrI3

Contact Info

Product

Resources

About

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Dual Character of the Insulating State in the van der Waals Fe_1–xNi_xPS₃ Alloyed Compounds

Coexistence of Ferromagnetism and Ferroelectricity in Cu-Intercalated Bilayer CrI₃