Corpus ID: 232478449

Spin-polarized voltage probes for helical edge state: a model study

@inproceedings{Adak2021SpinpolarizedVP,
  title={Spin-polarized voltage probes for helical edge state: a model study},
  author={Vivekananda Adak and Krishanu Roychowdhury and Sourin Das},
  year={2021}
}
Theoretical models of a spin-polarized voltage probe (SPVP) tunnel-coupled to the helical edge states (HES) of a quantum spin Hall system (QSHS) are studied. Our first model of the SPVP comprises NP spin-polarized modes (subprobes), each of which is locally tunnel-coupled to the HES, while the SPVP, as a whole, is subjected to a self-consistency condition ensuring zero average current on the probe. We carry out a numerical analysis which shows that the optimal situation for reading off spin… Expand