SKM 2023 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 7: 2D Materials and their Heterostructures IV

DS 7.3: Vortrag

Dienstag, 28. März 2023, 11:45–12:00, SCH A 316

Twistronics of high temperature superconductors — •Nicola Poccia — Leibniz Institute for Solid State and Materials Research Dresden (IFW-Dresden(

Ideally, one would like to have quantum technologies that could work at higher temperature and at the same time show all the advantages of a twisted architecture as for example its revolutionary degree of electronic tunability. However, highly tunable superconductors that operate above liquid nitrogen are either not yet showed up using multi-layered graphene twisted heterostructures or the materials are very difficult to assemble in twisted heterostructures given their extreme sensitivity to the environmental conditions. Here we show a possible avenue towards the resolution of this problem, demonstrating how to engineer a new generation of the van der Waals heterostructures comprising atomically high temperature superconducting thin Bi2Sr2Can-1CunO2n+4 (where n = 1,2,3) crystals. The intended van der Waals constituent Bi2Sr2Can-1CunO2n+4 planes are twisted with respect to each other and make the Josephson junctions. We measure different quantum transport properties of the Josephson junctions in a wide range of twisted angles, indicating the high temperature superconducting topological nature of these systems. Finally, technological prospects on the realization of hybrid complex superconducting circuits will be given.