Spin entanglement via scanning tunneling microscope current
- 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 a vanishing decay rate. The coupling to the electronic environment generates significant spin-spin entanglement via the dark state, even if the initial state is nonentangled.
| Author details: | Baruch HorovitzORCiD, Carsten HenkelORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1103/PhysRevB.104.L081405 |
| ISSN: | 2469-9950 |
| ISSN: | 2469-9969 |
| Title of parent work (English): | Physical review : B, Condensed matter and materials physics |
| Publisher: | American Physical Society |
| Place of publishing: | Ridge, NY |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2021/08/19 |
| Publication year: | 2021 |
| Release date: | 2023/12/11 |
| Volume: | 104 |
| Issue: | 8 |
| Article number: | L081405 |
| Number of pages: | 5 |
| Funding institution: | Deutsche Forschungsgemeinschaft through the German-Israeli partnership Program DIPGerman Research Foundation (DFG) [Schm-1049/7-1, Fo 703/2-1] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
