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O: Fachverband Oberflächenphysik

O 2: Organic Molecules on Inorganic Substrates I: Electronic, Optical and Other Properties I

O 2.9: Talk

Monday, March 27, 2023, 12:30–12:45, CHE 89

Clars goblet based J1 & J2 alternative heisenberg spin half chain — •Lin Yang — TU Dresden, Dresden, Germany

Spin-1/2 alternating-exchange Heisenberg chain has been intensively pursued for decades not only for understanding its underlying many-body physics but also for its great potential of realizing quantum computing and information. The existing candadites are limited in effective spin arrays embeded in three dimensional crystals, where the quasi-one dimensional spin system is inevitably affected by the cross talk between arrays and the spin-phonon coupling. Here, paradigmatic alternating-exchanging Heisenberg chains with spin-1/2 are realized in a designer graphene system using on-surface synthesis. The couplings: J1 = 38 meV, J2 = 23meV are determined by inelastic tunneling spectra, which is strong enough to support practical quantum operation.