Virtual seminar Feb. 2, 11h : Marcello Lopes (Berlin)

Marcello Lopes (Berlin, Germany)
"Epitaxial Growth of 2D Materials and Heterostructures"
Thu 2 Feb. 2023 (11h)

Next virtual meeting the GDR HOWDI will be held online
Thursday, February 2nd, 2023 at 11h

Marcelo Lopes (Paul-Drude-Institut für Festkörperelektronik, Berlin, Germany)

Epitaxial Growth of 2D Materials and Heterostructures

Abstract :

Van der Waals (vdW) heterostructures combining different 2D materials
have a great prospect for the realization of atomically thin devices
with tailored properties. To achieve a high density, bottom-up
integration, the synthesis of such heterostructures
via vdW epitaxy is a promising alternative to layer transfer, which is
problematic in terms of scaling and reproducibility. Nevertheless, due
to the weak bonding between 2D crystals, vdW epitaxy is sensitive to
various surface defects, usually leading to uncontrolled nucleation and
thus non-uniform growth of polycrystalline material. In this talk, I
will present results on molecular beam epitaxy (MBE) of hexagonal boron
nitride (h-BN) on graphene/SiC(0001). Specifically, I will discuss how
defect engineering in graphene can be employed to exert the control over
nucleation and thus to realize selective area growth of h-BN. In
addition, I will show our recent studies on ferromagnetic vdW
heterostructures with perpendicular magnetic anisotropy and high
transition temperatures, which were realized via MBE growth of the novel
2D ferromagnetic metal Fe5-xGeTe2 (FGT, with 0 ≤ x ≤ 2) on graphene as
well as h-BN templates.

Connexion info :
Time: Feb 2, 2023 11:00 AM Paris

Join Zoom Meeting
https://univ-grenoble-alpes-fr.zoom.us/j/95627215262?pwd=Y0dZMTh6OXljQVFXUzE0Z2xEcnJTQT09

Meeting ID: 956 2721 5262
Passcode: 969980