Spin entanglement via STM current

Baruch Horovitz, Carsten Henkel

Research output: Contribution to journalLetterpeer-review

37 Downloads (Pure)

Abstract

We consider a system of two spins under a scanning tunneling microscope bias and derive its master equation. We find that the tunneling elements to the electronic contacts (tip and substrate) generate an exchange interaction between the spins, as well as a Dzyaloshinskii-Moriya interaction in the presence of spin-orbit coupling. The tunnel current spectrum then shows additional lines compared to conventional spin resonance experiments. When the spins have degenerate Larmor frequencies and equal tunneling amplitudes (without spin-orbit), there is a dark state with vanishing decay rate. The coupling to the electronic environment generates significant spin-spin entanglement via the dark state, even if the initial state is non-entangled.
Original languageEnglish GB
JournalPhysical Review B
StatePublished - 1 Sep 2020

Keywords

  • Condensed Matter - Mesoscale and Nanoscale Physics

Fingerprint

Dive into the research topics of 'Spin entanglement via STM current'. Together they form a unique fingerprint.

Cite this