Anisotropic topological Hall effect with real and momentum space Berry curvature in the antiskrymion-hosting Heusler compound 
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Vir, Praveen; Gayles, Jacob; Sukhanov, A. S.; Kumar, Nitesh; Damay, F.; Sun, Yan; Kübler, J.; Shekhar, Chandra; Felser, Claudia

doi:10.1103/physrevb.99.140406

Cited by 44 publications

(59 citation statements)

References 38 publications

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“…This spin chirality generates an effective electromagnetic field for electrons through the spin Berry phase mechanism. The resulting Hall effect, known as the Topological Hall (TH) effect, has been observed in perovskite oxides [9][10][11][12], chiral magnets [13,14], frustrated magnets [15], and Heusler alloys [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces

2019

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Scalar spin chirality is expected to induce a finite contribution to the Hall response at low temperatures. We study this spin-chirality-driven Hall effect, known as the topological Hall effect, at the manganite side of the interface between La1−xSrxMnO3 and SrIrO3. The ferromagnetic doubleexchange hopping at the manganite layer, in conjunction with the Dzyaloshinskii-Moriya (DM) interaction which arises at the interface due to broken inversion symmetry and strong spin-orbit coupling from the iridate layer, could produce a skyrmion-crystal (SkX) phase in the presence of an external magnetic field. Using the Monte Carlo technique and a two-orbital spin-fermion model for manganites, supplemented by an in-plane DM interaction, we obtain phase diagrams which reveal at low temperatures a clear SkX phase and also a low-field spin-spiral phase. Increasing temperature, a skyrmion-gas phase, precursor of the SkX phase upon cooling, was identified. The topological Hall effect primarily appears in the SkX phase, as observed before in oxide heterostructures. We conclude that the manganite-iridate superlattices provide another useful platform to explore a plethora of unconventional magnetic and transport properties. arXiv:1905.09887v2 [cond-mat.str-el]

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Section: Introductionmentioning

confidence: 99%

“…A magnetic skyrmion generates an emergent electro-magnetic field [18,19], giving rise to topological Hall effect in metals. This effect also serves as an indirect yet effective probe for the chiral magnetic order in the SkX phase [20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces

2019

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“…Recently, the THE begins to attract tremendous attention since it gives the possibility to directly detect the topologically nontrivial spin textures, such as chiral magnetic domains or magnetic skyrmions, by electrical transport measurements. For example, the skyrmion phase was recently detected through the THE at low temperature range in Heusler alloys Mn 2 RhSn, [126] Mn 1.4 (Pt,Pd)Sn, [127,128] and Mn 2 CoAl. [129] Moreover, the interfacial Dzyaloshinskii-Moriya interaction (iDMI) was investigated in CFA ultrathin films of various thicknesses and with various buffer layers by measuring spin waves with Brillouin light scattering (BLS).…”

Section: Hall (And Related) Effectsmentioning

confidence: 99%

Spin‐Dependent Thermoelectric Transport in Cobalt‐Based Heusler Alloys

Granville

2020

Annalen der Physik

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Sitting at the intersection of spintronics and thermoelectricity, research investigating the coupling of thermoelectric, magnetic, and electrical transport properties in materials has recently found that the ferromagnetic Heusler alloys are the ideal testbeds. These materials have attracted a lot of attention due to their useful magnetotransport properties and the possibility of tailoring these properties by modifying their composition or producing heterostructures. With the diverse range of interesting phenomena in the Heusler alloys, ferromagnetic Heusler alloys are also ideal candidates for engineering spin caloritronic devices that can take advantage of the interplay of the physics of heat flow, magnetism, and electric potential. The fundamental physical concepts important to spin-dependent thermoelectrics research are introduced and recent studies of several ferromagnetic Heusler compounds are reviewed, highlighting some exceptional latest experiments on half-metallic Co 2 TiSn and the ferromagnetic Weyl semimetal Co 2 MnGa. Furthermore, the potential to generate useful magnetothermoelectric voltages in electronic devices based on the anomalous Nernst effect is discussed.

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“…A magnetic skyrmion generates an emergent electro-magnetic field 18,19 , giving rise to topological Hall effect in metals. This effect also serves as an indirect yet effective probe for the chiral magnetic order in the SkX phase [20][21][22][23][24][25][26][27][28][29][30][31] .…”

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confidence: 99%

Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions

et al. 2020

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Understanding the spin-wave excitations of chiral magnetic order, such as the skyrmion crystal (SkX), is of fundamental interest to confirm such exotic magnetic order. The SkX is realized by competing Dzyaloshinskii-Moriya and ferromagnetic-exchange interactions with a magnetic field or anisotropy. Here, we compute the dynamical spin structure factor, using Monte Carlo and spin dynamics simulations, extracting the spin-wave spectrum in the SkX, in the vicinity of the paramagnet to SkX transition. Inside the SkX, we find six spin-wave modes, which are supplemented by another mode originating from the ferromagnetic background. Above the critical temperature Ts for the skyrmion crystallization, we find a diffusive regime, reminiscent of the liquid-to-crystal transition, revealing that topological spin texture of skyrmionic character starts to develop above Ts as the precursor of the SkX. We discuss the opportunities for the detection of the spin waves of the SkX using inelastic-neutron-scattering experiments in manganite-iridate heterostructures.

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Anisotropic topological Hall effect with real and momentum space Berry curvature in the antiskrymion-hosting Heusler compound Mn1.4PtSn

Cited by 44 publications

References 38 publications

Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces

Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces

Spin‐Dependent Thermoelectric Transport in Cobalt‐Based Heusler Alloys

Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions

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