Quantum corrections to conductivity in an amorphous semiconductor
(Article submitted by a member of the editorial board S. E. Savotchenko)
DOI:
https://doi.org/10.52575/2687-0959-2022-54-3-186-191Keywords:
dirac semimetal, cadmium arsenide, thin films, weak antilocalizationAbstract
This article presents the results of a study of the magnetoresistance (MR) of a thin film of cadmium arsenide deposited on a sapphire leucosapphire substrate. In the study of MR, the effect of weak antilocalization, which arises due to surface states, was observed. The observed effect is well described by the Hikami-Larkin-Nagaoka model. The calculated value of the phase coherence length Lф varies depending on the temperature T according to the power law Lф ∼ T −1/2, which indicates the presence of two-dimensional topological surface states.
Downloads
References
Abrosimova G., Aronin A. 2016. Amorphous and nanocrystalline metallic alloys. Progress in Metallic Alloys, 9.
Altshuler B. L., Aronov A. G., Khmelnitsky D. E. 1982. Effects of electron-electron collisions with small energy transfers on quantum localisation. Journal of Physics C: Solid State Physics, 15(36): 7367–7386.
Armitage N. P., Mele E. J., Vishwanath A. 2018. Weyl and Dirac semimetals in three-dimensional solids. Rev. Mod. Phys., 90: 015001.
Cao J. et al. 2015. Landau level splitting in Cd3As2 under high magnetic fields. Nat. Commun., 6: 7779.
Jeon S. et al. 2014. Landau quantization and quasiparticle interference in the three-dimensional Dirac semimetal Cd3As2. Nat. Mater., 13: 851.
Hikami S., Larkin A. I., Nagaoka Y. 1980. Spin-orbit interaction and magnetoresistance in the two dimensional random system. Prog. Theor. Phys., 63(2): 707–710.
Holder C. F., Schaak, R. E. 2019. Tutorial on powder X-ray diffraction for characterizing nanoscale materials. Acs Nano, 13(7): 7359–7365.
Kong D. Cui Y. 2011. Opportunities in chemistry and materials science for topological insulators and their nanostructures. Nat. Chem., 3: 845.
Koumoulis D. et al. 2017. Effects of Cd vacancies and unconventional spin dynamics in the Dirac semimetal Cd3As2. The Journal of Chemical Physics, 147(8): 084706.
Lu H.-Z., Shi J., Shen S.-Q. 2011.Competition betweenWeak Localization and Antilocalization in Topological Surface States. Physical Review Letters, 107(7).
Mellnik A. R., et al. 2014. Spin-transfer torque generated by a topological insulator. Nature., 511(7510) : 449–451.
Narayanan A. et al. 2015. Linear Magnetoresistance Caused by Mobility Fluctuations in n-Doped Cd3As2. Phys. Rev. Letts., 114 : 117201.
Q, X.-L. Zhang S.-C. 2011. Topological insulators and superconductors. Rev. Mod. Phys. 83 : 1057.
Steinberg, H. et al. 2011. Electrically tunable surface-to-bulk coherent coupling in topological insulator thin films. Physical Review B, 84(23).
Wang S., Lin B.-C., Wang A.-Q., Yu D., Liao Z.-M. 2017. Quantum transport in Dirac and Weyl semimetals: A review. Adv. Phys. X, 2 : 518–544.
Wang Z. et al. 2013. Three-dimensional Dirac semimetal and quantum transport in Cd3As2. Phys. Rev. B, 88 : 125427.
Yi H. et al. 2014. Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2. Sci. Rep., 4 : 6106.
Zhao Y., et al. 2015. Anisotropic Fermi surface and quantum limit transport in high mobility threedimensional Dirac semimetal Cd3As2. Physical Review X, 5(3) : 031037.
Zhao B. et al. 2016. Weak antilocalization in Cd3As2 thin films. Sci. Rep., 6 : 22377.
Abstract views: 141
##submission.share##
Published
How to Cite
Issue
Section
Copyright (c) 2022 Applied Mathematics & Physics
This work is licensed under a Creative Commons Attribution 4.0 International License.
