| Autor: |
Oveshnikov LN; National Research Center 'Kurchatov Institute', Moscow, 123182, Russia. oveshln@gmail.com.; P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia. oveshln@gmail.com., Davydov AB; P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia., Suslov AV; National High Magnetic Field Laboratory, Tallahassee, Florida, 32310, USA., Ril' AI; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia., Marenkin SF; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia.; National University of Science and Technology 'MISiS', Moscow, 119049, Russia., Vasiliev AL; National Research Center 'Kurchatov Institute', Moscow, 123182, Russia.; Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region, 141700, Russia., Aronzon BA; P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia. |
| Abstrakt: |
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. |
