Electron-magnon scattering in an anisotropic half-metallic ferromagnetic Weyl semimetal 
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Rathod, Shivam; Malasi, Megha; Lakhani, Archana; Kumar, Devendra

doi:10.1103/physrevmaterials.6.084202

Cited by 3 publications

(1 citation statement)

References 90 publications

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“…The magnetic Weyl semimetals show a large AHA due to large σ xy A and small σ xx . The intrinsic σ xy,in A is robust and temperature independent, but the σ xx decreases with increasing temperature due to contributions from scattering mechanisms. , Therefore, in the case of intrinsically dominated σ xy A , the AHA shows a pronounced peak below T C , which is observed for x = 0 (≈12%) and y = z = 0.025 (≈16%), as shown in Figure j–l. At low temperatures, the AHA is improved for low doping ( x = 0.05, 0.1, and 0.2, y = z = 0.025) and decreases at higher doping.…”

Section: Resultsmentioning

confidence: 83%

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?

Rathod,

Malasi,

Lakhani

et al. 2024

Chem. Mater.

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Large spin−orbit coupling, kagome lattice, nontrivial topological band structure with inverted bands anticrossings, and Weyl nodes are essential ingredients ideally required to obtain maximal anomalous Hall effect (AHE) and are all present in Co 3 Sn 2 S 2 . It is a leading platform to show large intrinsic anomalous Hall conductivity (AHC) and giant anomalous Hall angle (AHA) simultaneously at low fields. The giant AHE in Co 3 Sn 2 S 2 is robust against small-scale doping-related chemical potential changes. In this work, we unveil a selective and cochemical doping route to maximize AHEs in Co 3 Sn 2 S 2 . To begin with, in Co 3 Sn 2−x In x S 2 , we brought the chemical potential at the hot spot of Berry curvature along with a maximum of asymmetric impurity scattering in the high mobility region. As a result, at x = 0.05, we found a significant enhancement of the AHA (95%) and AHC (190%) from the synergistic enhancement of extrinsic and intrinsic mechanisms due to the modified Berry curvature of gapped nodal lines. Later, with anticipation of further improvements in the AHE, we grew hole-codoped Co 3−y Fe y Sn 2−x In x S 2 crystals, where we surprisingly found a suppression of AHEs. The role of dopants in giving extrinsic effects or band broadening can be better understood if the chemical potential does not change on doping. By simultaneous and equal codoping with electrons and holes in Co 3−y−z Fe y Ni z Sn 2 S 2 , we kept the chemical potential unchanged. Henceforth, we found a significant enhancement in intrinsic AHC of ∼ 116% due to the disorder broadening in the kagome bands.

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Section: Resultsmentioning

confidence: 83%

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?

Rathod,

Malasi,

Lakhani

et al. 2024

Chem. Mater.

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Magnonics: Materials, physics, and devices

Han,

Wu,

Zhang

2024

Applied Physics Letters

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Magnon, the quanta of spin waves, can serve as an efficient spin information carrier for memory and logic applications, with the advantages of the Joule-heating free induced low power-dissipation property and the phase-coherent induced quantum phenomena. In analogy to spintronics, magnonics focuses on the excitation, detection, and manipulation of magnons (spin waves). In recent years, with the development of nanotechnology, abundant magnonic phenomena emerge in the nanoscale, such as the spin Seebeck effect, magnon-mediated electric current drag effect, magnon valve effect, magnon junction effect, magnon resonant transimission, magnon transfer torque, spin wave propagation, subterahertz spin wave excitation, magnon Bose–Einstein condensation, and so on. Here, we review the recent progresses in magnonics from physics, materials to devices, shedding light on the future directions for magnonics.

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Half-metallic ferromagnetism and intrinsic anomalous Hall effect in the topological Heusler compound Co2MnGe

Chatterjee,

Samanta,

Ghosh

et al. 2023

Phys. Rev. B

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Electron-magnon scattering in an anisotropic half-metallic ferromagnetic Weyl semimetal Co3Sn2S2

Cited by 3 publications

References 90 publications

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?

Magnonics: Materials, physics, and devices

Half-metallic ferromagnetism and intrinsic anomalous Hall effect in the topological Heusler compound Co2MnGe

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Electron-magnon scattering in an anisotropic half-metallic ferromagnetic Weyl semimetal Co3Sn2S2

Cited by 3 publications

References 90 publications

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co3Sn2S2?

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co3Sn2S2?

Magnonics: Materials, physics, and devices

Half-metallic ferromagnetism and intrinsic anomalous Hall effect in the topological Heusler compound Co2MnGe

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How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?

How to Enhance Anomalous Hall Effects in Magnetic Weyl Semimetal Co₃Sn₂S₂?