Spin filtering and entanglement detection due to spin-orbit interaction in carbon nanotube cross-junctions

Francesco Mazza, Bernd Braunecker, Patrik Recher, Alfredo Levy Yeyati

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We demonstrate that, due to their spin-orbit interaction, carbon nanotube cross-junctions have attractive spin projective properties for transport. First, we show that the junction can be used as a versatile spin filter as a function of a backgate and a static external magnetic field. Switching between opposite spin filter directions can be achieved by small changes of the backgate potential, and a full polarization is generically obtained in an energy range close to the Dirac points. Second, we discuss how the spin filtering properties affect the noise correlators of entangled electron pairs, which allows us to obtain signatures of the type of entanglement that are different from the signatures in conventional semiconductor cross-junctions.
Original languageEnglish
Article number195403
Number of pages12
JournalPhysical Review. B, Condensed matter and materials physics
Volume88
Issue number19
DOIs
Publication statusPublished - 7 Nov 2013

Keywords

  • cond-mat.mes-hall

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