The authors report that tensile strain applied to CsV3Sb5 strongly suppresses the charge-density-wave (CDW) gap, increases the mass of the fermions at the higher-order van Hove singularity (HO-VHS) and drives the energy of the HO-VHS towards the Fermi energy. Further, they suggest an important role of the HO-VHS in superconducting pairing.
- Chun Lin
- Armando Consiglio
- Johan Chang