Phys. Kolloquium: Detection of Classical and Quantum Correlations in Coupled Spin Systems using Scanning Tunneling Experiments
Wann
Dienstag, 25. Oktober 2016
15:15 bis 16:45 Uhr
Wo
R 513
Veranstaltet von
Fachbereich Physik, Organisation Scheer/Ganteför
Vortragende Person/Vortragende Personen:
PD Dr. Markus Ternes, Max-Planck Institute for Solid State Research, Stuttgart
Diese Veranstaltung ist Teil der Veranstaltungsreihe „Physikalisches Kolloquium“.
In recent years inelastic spin-flip spectroscopy using low-temperature scanning tunneling microscopes has been a very successful tool for studying not only individual spins but also complex coupled systems. When these systems interact with the electrons of the supporting electrodes correlated many-particle states can emerge, making them ideal prototypical quantum systems. In this lecture I will show how the controlled coupling of individual spin systems can lead not only to an energy shift of the eigenstates reminiscent of an externally applied field, but also to a bias asymmetry in the differential conductance. Using S = 1 and S = 1/2 model systems of CoHX on a h-BN/Rh(111) substrate [1] in conjunction with model Hamiltonians [2] which takes the coupling and correlation to the environment explicitly into account enables to precisely determine and control the emergence of correlations between the two subsystems on tip and sample [3].
[1] P. Jacobson et al., Nature Communications 6, 8536 (2015).
[2] M. Ternes, New J. Phys. 17, 063016 (2015).
[3] M. Muenks, et. al., arXiv:1605.02798 [cond-mat.mes-hall] (2016).