Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 57: Correlated Magnetism – Kagome Systems
TT 57.9: Vortrag
Mittwoch, 11. März 2026, 17:15–17:30, CHE/0091
Emergent Network of Josephson Junctions in a Kagome Superconductor — •Tycho Blom1, Matthijs Rog1, Marieke Altena2, Andrea Capa Salinas3, Stephen Wilson3, Milan Allan1,4, Chuan Li2, and Kaveh Lahabi1 — 1Huygens-Kamerlingh Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands — 2MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands — 3Materials Department, University of California Santa Barbara, Santa Barbara, California 93106, USA — 4Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians- University Munich, Munich 80799, Germany
Materials with a Kagome lattice are intensely studied because they host exotic states that combine strong correlations and topology. In this talk, I will describe several unique phenomena that are observed in the Kagome superconductor CsV3Sb5−xSnx (x = 0.03-0.04), and show that a network of Josephson junctions spontaneously emerges below the transition temperature in thin, homogeneous flakes. Using magnetotransport experiments under both DC and radio frequency current bias, I will demonstrate that the junctions are localized and stable, and that supercurrent must flow in filaments. These results pave the way for determining the exact nature of superconductivity in the AV3Sb5 family.
Keywords: Superconductivity; Josephson junction; Charge density wave; Shapiro steps; Flakes