NMR Investigation of the WTe2 Weyl Semimetal below the Topological Transition Temperature

Antonenko, A. O.; Charnaya, E. V.; Lee, M. K.; Chang, Liang; Haase, Jürgen; Наумов, С. В.; Domozhirova, A. N.; Марченков, В. В.

doi:10.1134/s1063783419110040

Cited by 7 publications

(3 citation statements)

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“…Properties of topological insulators and Weyl semimetals were considered in works [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Dirac materials, which include graphene, topological insulators and Dirac and Weyl semimetals, represent new states of matter with unique electronic structure and new physical properties.…”

Section: Discussionmentioning

confidence: 99%

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Plasma conduction mechanism in topological insulators

Netesova

2024

Oxide-Based Materials and Devices XV

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The conducting properties of crystal topological insulators and Weyl semimetals within the plasma mechanism of superconductivity have been considered. Such compounds A2B3, AB2, AB are bismuth selenide Bi2Se3 and telluride Bi2Te3, antimony telluride Sb2Te3 and their solid solutions, tungsten telluride WTe2, magnesium diboride MgB2, tantalum arsenide TaAs, tantalum phosphide TaP, niobium arsenide NbAs, niobium phosphide NbP.The equation has been proposed 2 AB = A2 + B2 + ▲Φ.Square plasma electron energies Φ 2 (ρ, s, M, q, β), square electron splitting energies ▲Φ 2 in (eV) 2 were calculated, where Φ 2 (ab), Φ 2 (a), Φ 2 (b) -square electron energy AB, A, B, ▲Φ 2 is square energy splitting of compounds into diatomic molecules at absolute zero Tc = 0, respectively, ρ is the density, s is the number of valence electrons, M is the molecular (atomic) mass, q and β are parameters.▲Φ 2 (Bi2Se3) = 765.70143384 ▲Φ 2 (Bi2Te3) = 672.88715592 ▲Φ 2 (Sb2Te3) = 704.74855610 ▲Φ 2 (WTe2) = 367.01888428 ▲Φ 2 (MgB2) = 435.17777627 ▲Φ 2 (TaAs) = ▬102.44793138 ▲Φ 2 (TaP) = ▬246.35400903 ▲Φ 2 (NbAs) = ▬83.59742866 ▲Φ 2 (NbP) = ▬241.26056837. β = 2.5, q (Bi2Se3) = 1.02608569, Tc = ▬ 7.3039932 K β = 2.5, q (Bi2Te3) = 0.997794409, Tc = 0.61756548 K β = 2.5, q (Sb2Te3) = 1.015846129, Tc = ▬ 4.43691612 K According to our calculations, superconductivity of doped A2B3 topological insulators was found above absolute zero temperature. Additional restrictions are caused by strong spin-orbit coupling. Theoretical calculations are confirmed by known experimental data.

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Section: Discussionmentioning

confidence: 99%

“…The temperature of the topological phase transition in tungsten ditelluride WTe2 is Tc ≈ 101.86 K (β = 1). This phase transition was studied in [21,33].…”

Section: Discussionmentioning

confidence: 99%

Plasma conduction mechanism in topological insulators

Netesova

2024

Oxide-Based Materials and Devices XV

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“…Note: Similar 1/T 1 data of WTe 2 for powder samples were found in the literature during the preparation of the manuscript, which qualitatively agree with our data. 46,47)…”

Section: Discussionmentioning

confidence: 99%

Site-dependent Local Spin Susceptibility and Low-energy Excitation in a Weyl Semimetal WTe$_2$

Yokoo,

Watanabe,

Kumazaki

et al. 2022

Preprint

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Site-dependent local spin susceptibility is investigated with 125 Te nuclear magnetic resonance in a Weyl semimetal WTe 2 . The nuclear spin-lattice relaxation rate 1/T 1 T shows a dependence of the square of temperature T at high temperatures, followed by a constant behavior below 50 K. The temperature dependence features Weyl fermions appearing around the linearly crossing bands. The Knight shift K scales to the square root of 1/T 1 T , corroborating a predominant spin contribution in low-lying excitation. The observed dependence of K and 1/T 1 T on the four Te sites shows the site-dependent electron correlation and density of states. The angular profile of the NMR spectrum gives the anisotropic hyperfine coupling tensor, consistent with 5p hole occupations on Te sites.

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