Tunable Fano and Dicke resonant tunneling of double quantum dots sandwiched between topological insulators
arxiv(2024)
Abstract
We study the resonant tunneling in double quantum dots (DQD) sandwiched
between surfaces of topological insulator (TI) Bi_2Te_3, which possess
strong spin-orbit coupling (SOC) and ^dC_3v double group symmetry.
Distinct from the spin-conserved case with two-dimensional electron gas (2DEG)
electrodes, the conductance displays an asymmetrical double-peak Fano-type
lineshape rather than Dicke-type lineshape in the zero-field cases. While a
Landau-Zener-like lineshape trajectory, which is identified as a signal of
competition effect, could be developed by increasing the strength of interdot
hopping. Furthermore, when applying an in-plane Zeeman field, we find that the
conductance lineshape crossover between Fano and Dicke type could be driven by
tilting the field orientation. Moreover, the rotational symmetry of the system
could also be revealed from the lineshape trajectory. Our findings will
contribute to a better understanding of the resonant tunneling in the presence
of electrode SOC and may be confirmed experimentally in the future.
MoreTranslated text
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined