Nonlinear Hall Effect in Three-Dimensional Weyl and Dirac Semimetals

Shvetsov, O. O.; Esin, V. D.; Timonina, A. V.; Kolesnikov, N. N.; Deviatov, E. V.

doi:10.1134/s0021364019110018

Cited by 65 publications

(61 citation statements)

References 27 publications

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“…For thermolelectric measurements we use four-point lock-in technique with second harmonic detection [18][19][20]. Thermal gradient is created by ac current I ac cos(ωt) applied between two Au-SnSe heating contacts C1 and C4, see Fig.…”

Section: Samples and Techniquesmentioning

confidence: 99%

“…Ferroelectric polarization is also sensitive to current-induced electric field in conducting structures, which is impossible for ferroelectric insulators. Even for small absolute values of the effect, corresponding temperature gradients should be detectable by in-situ thermoelectric response measurements [18][19][20]. Among different materials, layered SnSe single crystals can be convenient for these investigations: thin SnSe flakes (300 nm and below) are characterized by the in-plane ferroelectric polarization [22,23] in addition to significant thermoelectric properties [21].…”

Section: Introductionmentioning

confidence: 99%

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Thermoelectric response as a tool to observe electrocaloric effect in a thin conducting ferroelectric SnSe flake

Orlova,

Timonina,

Kolesnikov

et al. 2021

Preprint

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We experimentally investigate thermoelectric response of a 100 nm thick SnSe single crystal flake under the current-induced dc electric field. Thermoelectric response appears as a second-harmonic transverse voltage V 2ω xy , which reflects temperature gradient across the sample due to the Joule heating by harmonic ac excitation current Iac. In addition to strongly non-monotonous dependence V 2ωxy , we observe that dc field direction controls the sign of the temperature gradient in the SnSe flake. We provide arguments, that electrocaloric effect is the mostly probable reason for the results obtained. Thus, our experiment can be understood as demonstration of the possibility to induce electrocaloric effect by in-plane electric field in conducting ferroelectric crystals and to detect it by thermoelectric response.

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Section: Samples and Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermoelectric response as a tool to observe electrocaloric effect in a thin conducting ferroelectric SnSe flake

Orlova,

Timonina,

Kolesnikov

et al. 2021

Preprint

Self Cite

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“…[170] On (b): WSe 2 crystals can also be obtained from various fluxes (PbCl 2 , Bi, Sb, Te). [134] WTe 2 : (a) [83,180,306] , (c) [181] On (a): WTe 2 has been known for almost than 100 years. [182] It was characterized by X-ray diffraction in 1956.…”

Section: Group 6 and Uraniummentioning

confidence: 99%

Preparation and Crystal Growth of Transition Metal Dichalcogenides

Schmidt

Gooth²,

Binnewies³

2020

Zeitschrift anorg allge chemie

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Dichalcogenides are known from almost all transition metals. The representatives of this class of compounds show a number of interesting physical and chemical properties depending on their constituent transition metal and crystal structure, which makes them interesting for basic studies and applications in high‐end electronics, spintronics, optoelectronics, energy storage, flexible electronics, DNA sequencing and personalized medicine to this day. Many of these properties and effects can only be investigated on chemically and crystallographically pure samples ‐ usually on single crystals. The vast majority of these compounds can be crystallized using chemical vapour transport. However crystallization from the melt is also possible in a considerable number of compounds, including the frequently used self‐flux technique. For several compounds the crystallization from different solvents or solvent mixtures by means of solvothermal or hydrothermal synthesis is described.

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“…Second order non-linear Hall effect was experimentally first observed in few layer transition metal dichalcogenide WTe 2 40,41 . Following these pioneering reports, signatures of non-linear Hall signals have been detected in a growing number of materials, including Dirac semimetals 42 , Kondo materials 43 , artificially corrugated bilayer graphene 44 , monolayer WSe 2 45 , twisted WSe 2 46 , MoTe 2 47 , organic Dirac materials 48 , topological insulator surfaces 49 and Weyl semimetal TaIrTe 4 50 . Very recently, third order non-linear signals have been experimentally detected in MoTe 2 51 .…”

Section: Introductionmentioning

confidence: 99%

Non-Linear Hall Effect in Multi-Weyl Semimetals

Roy¹,

Narayan²

2021

Preprint

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In the presence of time reversal symmetry, a non-linear Hall effect can occur in systems without an inversion symmetry. One of the prominent candidates for detection of such Hall signals are Weyl semimetals. In this article, we investigate the Berry curvature induced second and third order Hall effect in multi-Weyl semimetals with topological charges n = 1, 2, 3. We use low energy effective models to obtain general analytical expressions and discover the presence of a large Berry curvature dipole in multi-Weyl semimetals. We also study the Berry curvature dipole in a realistic tight-binding lattice model and observe two different kinds of variation with increasing topological charge -these can be attributed to different underlying Berry curvature components. We provide estimates of the signatures of second harmonic of Hall signal in multi-Weyl semimetals, which can be detected experimentally. Furthermore, we predict the existence of a third order Hall signal in multi-Weyl semimetals. We derive the analytical expressions of Berry connection polarizability tensor, which is responsible for third order effects, using a low energy model and estimate the measurable conductivity. Our work can help guide experimental discovery of Berry curvature multipole physics in multi-Weyl semimetals.

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Nonlinear Hall Effect in Three-Dimensional Weyl and Dirac Semimetals

Cited by 65 publications

References 27 publications

Thermoelectric response as a tool to observe electrocaloric effect in a thin conducting ferroelectric SnSe flake

Thermoelectric response as a tool to observe electrocaloric effect in a thin conducting ferroelectric SnSe flake

Preparation and Crystal Growth of Transition Metal Dichalcogenides

Non-Linear Hall Effect in Multi-Weyl Semimetals

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