Quantum oscillations in the Kagome superconductors AV Sb (A = K, Rb, Cs)

The layered Kagome metals AV Sb (A = K, Rb, Cs) exhibit a unique combination of nontrivial band topology, competing
charge- and superconducting orders and clear signatures of electron correlations. Using thermodynamic (magnetization,
magnetostriction, thermal expansion) and transport measurements, we have investigated the normal- and superconducting
state properties of high-quality single crystals. Clear signatures of quantum oscillations were observed in all these
quantities. The nature of the Fermi surface in the CDW state and the interplay with superconductivity is discussed in the
light of recent theoretical models.