SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 74: 2D Materials IV: Heterostructures (joint session O/CPP)
O 74.2: Vortrag
Donnerstag, 30. März 2023, 10:45–11:00, GER 37
Designer quantum states in metal-organic frameworks — •Orlando J Silveira1, Linghao Yan1, Shawulienu Kezilebieke2, Benjamin Alldritt1, Viliam Vano1, Ondřej Krejčí1, Jose Lado1, Adam S Foster1,3, and Peter Liljeroth1 — 1Department of Applied Physics, Aalto University, Espoo, Finland — 2University of Jyväskylä, FI-40014 University of Jyväskylä, Finland — 3Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
Vertical heterostructures have emerged as a promising path to the design of quantum materials with exotic properties. Here, we show that this concept can be also extended to a family of 2D kagome metal-organic frameworks (MOFs) of the family M2DCA3, with M= Cu and Ni. The two MOFs have been fabricated either on a graphene/Ir(111) surface or the superconducting substrate NbSe2, and the structural and electronic properties of different phases of both 2D MOFs + substrates were studied through density functional theory (DFT) calculations. Results show that the Cu2DCA3 MOF is effectively decoupled from the Ir(111) metallic substrate by the graphene layer, which is important to reveal the topological properties of this family of MOF. Moreover, this study extends the synthesis and electronic tunability of 2D MOFs beyond the metal surfaces to superconducting substrates, which are needed for the development of emerging quantum materials. We show that the Ni3DCA2 MOF has a spin density around the Ni atom when synthesized on the NbSe2 substrate due to charge transfer, and this makes a perfect platform to realize topological superconductivity.