Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 17: Spins on surfaces at the atomic scale – Poster
O 17.7: Poster
Monday, March 9, 2026, 18:00–20:00, P2
Atomic-Scale Engineering of Spin Defects in Monolayer MoS2 — •Johannes Schwenk1, Wantong Huang1, Kwan Ho Au-Yeung1, Johanna Matusche1, Paul Greule1, Jonas Arnold1, Lovis Hardeweg1, Máté Stark1, Luise Renz1, Affan Safeer2, Daniel Jansen2, Jeison Fischer2, Thomas Michely2, Wolfgang Wernsdorfer1, Christoph Sürgers1, Wouter Jolie2, and Philip Willke1 — 1Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 2II. Physikalisches Institut, Universität zu Köln, Köln, Germany
Solid-state spin defects have become a promising platform for quantum technologies, including quantum sensing, communication, and computing. However, reliably creating and addressing such defects individually remains a major challenge. Here, we create distinct defect types in monolayer MoS2 using the tip of a scanning tunnelling microscope, i.e. sulphur vacancies and substitutional impurities. Moreover, we characterize their spin properties using electron spin resonance scanning tunnelling microscopy (ESR-STM) and demonstrate coherent control of the spin defects. By constructing dimers of defects, we show that their spins can be coupled via magnetic exchange, which provides a path to realize larger spin structures. These results open a new avenue to design and engineer quantum states at the atomic scale for applications in quantum sensing and simulations [Nat. Nanotech.19,1782-1788 (2024)].
Keywords: ESR; STM; MoS2