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Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Correlated Electrons: Charge Order

TT 39.2: Vortrag

Freitag, 9. September 2022, 11:30–11:45, H23

Quantum oscillations in the Kagome superconductor CsV3Sb5 — •Anmol Shukla1, Liran Wang1, Frédéric Hardy1, Amir-Abbas Haghighirad1, Mingquan He2, Wei Xia3, Yanfeng Guo3, and Christoph Meingast11Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany — 2Low Temperature Physics Lab, College of Physics & Center of Quantum Materials and Devices, Chongqing University, Chongqing 401331, China — 3School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

The recently discovered layered Kagome metals AV3Sb5 (A = K, Rb, Cs) exhibit a unique combination of nontrivial band topology, competing for the charge- and superconducting orders with clear signatures of electron correlations. Using magnetization, resistivity, thermal expansion, magnetostriction and heat capacity, we have investigated the normal- and superconducting-state properties of single crystals of the kagome superconductor CsV3Sb5. The magnetization and magnetostriction data show clear signatures of quantum oscillations with at least two distinct frequencies. These are much less evident in the heat capacity. Combining the results from these thermodynamic probes and transport measurement, we discuss the nature of the Fermi surface and the interplay between the charge order and superconductivity.

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