Institut des
NanoSciences de Paris
insp
Accueil > Evénements > Séminaires > Spin excitations and (...)
insp
1.jpg

Séminaire Matériaux 2D de l’INSP

Spin excitations and highly-correlated Kondo screening in atomic scale structures detected with scanning probe methods - Markus Ternes - Vendredi 18 décembre 2020 à 11 h

En visiocobférence

Markus Ternes - Professeur à l’Université d’Aachen, Allemagne

Abstract

Scanning probe microscopes have been very successful tools for studying individual atoms and molecules as well as complex structures. Systems which bear magnetic spin moments can be build with them on surfaces and stabilized in junctions. When such spins interact with each other or with the supporting electron baths, entanglement and correlated many-particle states can emerge, making them ideal prototypical quantum systems.

In this presentation I will show that experiments in conjunction with model Hamiltonians [1, 2] can be used as model systems to explore this fascinating quantum world and shred light on the prototypical highly correlated Kondo physics.

Furthermore I will show how specially crafted tips, in which the apex is a functionalized quantum system can be used to detail the manipulation of the spin moment [3] or the transition mechanism between different quantum phases. Controlling the couplings between individual spins enables thereby the quantification of spin-spin correlations [4], the detection “dark” moments [5, 6] as well as the emergence of entanglement [7].

1. M. Ternes, New J. Phys. 17, 063016 (2015).

2. M. Ternes, Prog. Surf. Sci. 92, 83 (2017).

3. P. Jacobson, et al., Nature Communications 6, 8536 (2015).

4. M. Muenks, et al., Nature Communications 8, 14119 (2017).

5. B. Verlhac, et al., Science 366, 623 (2019).

6. M. Ternes et al. Phys Rev. Lett. 124, 167202 (2020). 7. D.-J. Choi, et al., Nano Lett. 17, 6203 (2017).