X-Ray Studies of Molybdenum and Tungsten Phosphides.

Rundqvist, Stig; Lundström, Torsten

doi:10.3891/acta.chem.scand.17-0037

Cited by 84 publications

(53 citation statements)

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“…1b, all the diffraction peaks are fully explained using a single phase in Pnma (No. 62) with lattice parameters a= 5.7222(6) Å, b=3.2434(9) Å, and c=6.2110 (6) Å, which are in good agreement with previously reported values [17,18].…”

Section: Methodssupporting

confidence: 90%

Superconductivity in WP single crystals

Liu

Zhao

et al. 2019

Phys. Rev. B

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We report the discovery of superconductivity on high-quality single crystals of transition-metal pnictides WP grown by chemical vapor transport (CVT) method.Bulk superconductivity is observed at T c = 0.84 K under ambient pressure by electrical resistivity and AC magnetic susceptibility measurements. The effects of magnetic field on the superconducting transitions are studied, leading to a large anisotropy parameter around 2 with the in-plane and out-of-plane upper critical fields of 2,∥ =172 Oe and 2,⊥ =85 Oe, respectively. Our finding demonstrates that WP is the first superconductor in 5d transition-metal at ambient pressure in MnP-type, which will help to search for new superconductors in transition-metal pnictides.

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Section: Methodssupporting

confidence: 90%

Superconductivity in WP single crystals

Liu

Zhao

et al. 2019

Phys. Rev. B

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“…10 The average Mo: P atomic ratio determined by EDX is close to 1 : 2, consistent with the composition of MoP 2 .…”

Section: Resultssupporting

confidence: 69%

Magnetotransport properties of MoP2

et al. 2017

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We report magnetotransport and de Haas-van Alphen (dHvA) effect studies on MoP2 single crystals, predicted to be type-II Weyl semimetal with four pairs of robust Weyl points located below the Fermi level and long Fermi arcs. The temperature dependence of resistivity shows a peak before saturation, which does not move with magnetic field. Large nonsaturating magnetoresistance (MR) was observed, and the field dependence of MR exhibits a crossover from semicalssical weakfield B 2 dependence to the high-field linear-field dependence, indicating the presence of Dirac linear energy dispersion. In addition, systematic violation of Kohler's rule was observed, consistent with multiband electronic transport. Strong spin-orbit coupling (SOC) splitting has an effect on dHvA measurements whereas the angular-dependent dHvA orbit frequencies agree well with the calculated Fermi surface. The cyclotron effective mass ∼ 1.6me indicates the bands might be trivial, possibly since the Weyl points are located below the Fermi level. Interestingly, quasi-two dimensional(2D) band structure is observed even though the crystal structure of MoP2 is not layered.

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“…The data can be fitted quite well by the space group Cmc2 1 with lattice parameter a = 0.3164(2) nm, b = 1.184(2) nm, and c = 0.4980(2) nm, consistent with previous report. 15 The average atomic ratio determined by the EDX is W: P = 1: 2. Figure 1(b) shows the temperature dependence of resistivity in WP 2 in different fields.…”

Section: Resultsmentioning

confidence: 99%

“…[15][16][17][18] Indeed, WP 2 was recently predicted to be a type-II Weyl semimetal with four pairs of type-II Weyl points and long topological Fermi arcs. 19 In this work, we have successfully grown single crystals of WP 2 , and have investigated its magnetotransport properties.…”

Section: 14mentioning

confidence: 99%

Large magnetoresistance in the type-II Weyl semimetal WP2

et al. 2017

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We report magnetotransport study on type-II Weyl semimetal WP2 single crystals. Magnetoresistance (MR) exhibits a nonsaturating H n field dependence (14,300% at 2 K and 9 T) whereas systematic violation of Kohler's rule was observed. Quantum oscillations reveal a complex multiband electronic structure. The cyclotron effective mass close to the mass of free electron me was observed in quantum oscillations along b-axis, while reduced effective mass of about 0.5me was observed in a-axis quantum oscillations, suggesting Fermi surface anisotropy. Temperature dependence of the resistivity shows a large upturn that cannot be explained by the multi-band magnetoresistance of conventional metals. Even though crystal structure of WP2 is not layered as in transition metal dichalcogenides, quantum oscillations suggest partial two-dimensional character.

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X-Ray Studies of Molybdenum and Tungsten Phosphides.

Cited by 84 publications

References 0 publications

Superconductivity in WP single crystals

Superconductivity in WP single crystals

Magnetotransport properties of MoP2

Large magnetoresistance in the type-II Weyl semimetal WP2

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