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

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作者：
Leonid N. Oveshnikov
Alexander B. Davydov
Alexey V. Suslov
Alexey I. Ril’
Sergey F. Marenkin
Alexander L. Vasiliev
Boris A. Aronzon
机构：
[1] National Research Center “Kurchatov Institute”,P. N. Lebedev Physical Institute
[2] Russian Academy of Sciences,Kurnakov Institute of General and Inorganic Chemistry
[3] National High Magnetic Field Laboratory,undefined
[4] Russian Academy of Sciences,undefined
[5] National University of Science and Technology “MISiS”,undefined
[6] Moscow Institute of Physics and Technology,undefined
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Scientific Reports | / 10卷
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摘要：
In this study we observed the reproducible superconducting state in Cd3As2 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 Cd3As2 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 Cd3As2 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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