Transport in quantum spin Hall edges in contact to a quantum dot
arXiv:1605.06875 · doi:10.1103/PhysRevB.94.125425
Abstract
We study the transport mechanisms taking place in a quantum spin Hall bar with an embedded quantum dot, where electrons localize and experience Coulomb interaction U as well as spin-flip processes λ. We solve the problem with non-equilibrium Green functions. We focus on the linear response regime and treat the many-body interactions with quantum Monte Carlo. The effects of U and λ are competitive and the induced transport takes place through different channels. The two mechanisms can be switched by changing the occupation of the dot with a gate voltage.
7 pages and 8 figures, new figures and references were added
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Cited by in corpus (4)
- Optimal thermoelectricity with quantum spin-Hall edge states
- Helical spin thermoelectrics controlled by a side-coupled magnetic quantum dot in the quantum spin Hall state
- Spin-resolved electron waiting times in a quantum dot spin valve
- Localized states coupled to a network of chiral modes in minimally twisted bilayer graphene