Vapor-Phase Synthesis and Magnetoresistance of (Cd1-Xznx)3as2 (X = 0.007) Single Crystals

Kochura, A. V.; Oveshnikov, L. N.; Kuzmenko, A. P.; Давыдов, А. Б.; Gavrilkin, S. Yu.; Zakhvalinskii, V. S.; Kulbachinskii, V.A.; Khokhlov, N. A.; Аронзон, Б. А.

doi:10.1134/s0370274x1903007x

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“…2 979 Zn . 0 021 As 2 single crystals 28 we observed anisotropic SdH oscillations, which had single frequency of about 28 T in the transverse field and two close frequencies in the longitudinal field. Such behavior was ascribed to the nesting of two Fermi ellipsoids, i.e., to the Fermi level being close to the Lifshitz point.…”

Section: Sdhmentioning

confidence: 73%

“…Such behavior was ascribed to the nesting of two Fermi ellipsoids, i.e., to the Fermi level being close to the Lifshitz point. While Zn-doping varies the band structure of Cd 3 As 2 crystal, we believe that due to low Zn content in the studied crystal 28 . It also yields integral electron mobility values in studied films of about µ ≈ 350 cm 2 /(V⋅s).…”

Section: Sdhmentioning

confidence: 78%

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Superconductivity and Shubnikov - de Haas effect in polycrystalline Cd3As2 thin films

Oveshnikov

Давыдов

Suslov

et al. 2020

Sci Rep

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In this study we observed the reproducible superconducting state in Cd 3 As 2 thin films without any external stimuli. Comparison with our previous results reveals similar qualitative behavior for films synthesized by different methods, while the difference in the values of the critical parameters clearly shows the possibility to control this state. The X-ray diffraction measurements demonstrate the presence of the tetragonal Cd 3 As 2 crystal phase in studied films. Measurements of high-field magnetoresistance reveal pronounced Shubnikov-de Haas oscillations. The analysis of these oscillations suggests that, due to high carrier concentration in studied Cd 3 As 2 films, the initial Dirac semimetal phase may be partially suppressed, which, however, does not contradict with possible topological nature of the observed superconductivity.

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Section: Sdhmentioning

confidence: 73%

Section: Sdhmentioning

confidence: 78%