SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 28: Spin Qubits
QI 28.7: Vortrag
Donnerstag, 9. März 2023, 12:45–13:00, F428
Manipulating electron spin entanglement with a scanning tunnelling microscope — •Carsten Henkel1 and Baruch Horovitz2 — 1Universität Potsdam, Institut für Physik und Astronomie — 2Ben Gurion University of the Negev, Department of Physics, Beer Sheva, Israel
The tunnel current of a scanning microscope contains, in its fluctuations, information about localised spin sites in the contact region. In a magnetic field, this provides an alternative take on electron spin resonance spectroscopy. We showed previously that the features of the current spectrum can be explained by two localised spins that provide interfering tunnelling pathways [1]. The two spins experience effective exchange and Dzyaloshinskii-Moriya couplings and decay channels when the electronic contacts are integrated out [2]. Observed spin spectra can be fitted to the results of a master equation [3]. We report on voltage quenches and current measurements that manipulate the two-spin state and analyse its entanglement [2].
[1] B. Horovitz and A. Golub, Phys. Rev. B 99 (2019) 241407(R)
[2] B. Horovitz and C. Henkel, Phys. Rev. B (Lett.) 104 (2021) L081405
[3] Y. Manassen, M. Jbara, M. Averbukh, Z. Hazan, C. Henkel, and B. Horovitz, Phys. Rev. B 105 (2022) 235438