Stuctural Distortions in Kagome Superconductor CsV₃Sb₅ Investigated with Quantum Oscillations

The coexistence of superconductivity with an additional order parameter has intrigued our scientific community, showing much interest in the family of Kagome Superconductors AV₃Sb₅ (A = K, Cs, Rb). In this material family, the role of charge density wave (CDW) order has shown both interplay and competition with superconductivity. Thus, understanding the CDW phase will provide insight into the superconducting pairing mechanism. In this study, we utilize quantum oscillations to map the fermi surface of CsV3Sb5 through the tunnel diode oscillator measurements [1]. While previous studies show the Star of David (SD) and Inverted Star of David (ISD) distortions, our results provide new orbits which cannot be captured by either distortion [1]. This suggests a dramatic renormalization of the Fermi surface due to a complex structural distortion involving interlayer ordering.