Quantum Corrections and Magnetotransport in 3D Dirac Semimetal Cd3 –xMnxAs2 Films
- Authors: Mekhiya A.B.1, Kazakov A.A.1, Oveshnikov L.N.1,2, Davydov A.B.1, Ril A.I.3, Marenkin S.F.3,4, Aronzon B.A.1
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Affiliations:
- Lebedev Physical Institute, Russian Academy of Sciences
- NRC “Kurchatov Institute”
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
- NUST MISiS
- Issue: Vol 53, No 11 (2019)
- Pages: 1439-1444
- Section: Surfaces, Interfaces, and Thin Films
- URL: https://journals.rcsi.science/1063-7826/article/view/207266
- DOI: https://doi.org/10.1134/S1063782619110137
- ID: 207266
Cite item
Abstract
Thin films of solid solutions based on the three-dimensional Dirac semimetal Cd3As2 with the addition of manganese are investigated. Cd3 –xMnxAs2 films (x = 0, 0.05, and 0.1) 50–70 nm in thickness are formed on a glassceramic substrate using vacuum-thermal deposition from cadmium arsenide ingots doped by Mn and fabricated by direct alloying elements by the vacuum-cell method. The temperature and magnetic-field dependences of the resistance are measured and the transport parameters of the films under study are determined. Positive magnetoresistance of the characteristic shape corresponding to the contribution of the weak antilocalization effect is observed for films with x = 0 and 0.05. The contribution from the weak localization effect is observed at a higher Mn content (x = 0.1). This change in the quantum correction type as applied to topological semimetals points to reconstruction of the band structure and transition from the Dirac semimetal state into a trivial semiconductor phase, which corresponds to the critical Mn content xc ~ 0.07 in this case.
About the authors
A. B. Mekhiya
Lebedev Physical Institute, Russian Academy of Sciences
Author for correspondence.
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991
A. A. Kazakov
Lebedev Physical Institute, Russian Academy of Sciences
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991
L. N. Oveshnikov
Lebedev Physical Institute, Russian Academy of Sciences; NRC “Kurchatov Institute”
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991; Moscow, 123182
A. B. Davydov
Lebedev Physical Institute, Russian Academy of Sciences
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991
A. I. Ril
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991
S. F. Marenkin
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences; NUST MISiS
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991; Moscow, 119049
B. A. Aronzon
Lebedev Physical Institute, Russian Academy of Sciences
Email: a_mehia@mail.ru
Russian Federation, Moscow, 119991