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Shubnikov-de-Haas Oscillations in topological and non-topological electron systems


Here we present research plans to investigate Shubnikov-de-Haas oscillations in a number of quantum well systems ranging from ordinary two-dimensional electron gases in InAs, GaAs single quantum wells with competing Rashba and Dresselhaus couplings to topological 2D structures such as InAs/GaSb double wells where topological insulating behavior has been predicted. Our approach relies on obtaining the density of states of two dimensional systems in the presence of quantizing magnetic fields via trace formulas which we then combine with a phenomenological (Drude type) semiclassical approach to determine the magnetoresistence of the system. We also envision applying our approach to investigate quantum oscillations in anomalous quantum Hall systems (Chern insulators) and Weyl semimetals. Our proposal is motivated by some recent experimental results involving SdH oscillations in topological insulators and Rashba-Dresselhaus coupled systems: Beukman \textit{et al.}, Phys. Rev. \textbf{96}, 241401(R) (2017) and Cimpoiasu \textit{et al.} J. Appl. Phys. \textbf{126}, 075704 (2019). This proposal is also an outgrowth or our own recent collaborative works. (AU)

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(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SCHLIEMANN, JOHN; COSTA, I, JOAO VITOR; WENK, PAUL; EGUES, J. CARLOS. Many-body localization: Transitions in spin models. Physical Review B, v. 103, n. 17, . (16/08468-0, 18/19017-4, 20/00841-9)

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