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A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity

A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity

Van Hove singularity (VHS) has been considered as a driving source for unconventional superconductivity. A VHS in two-dimensional (2D) materials consists of a saddle point connecting electron-like and hole-like bands. In a rare case, when a VHS appears at Fermi level, both electron-like and hole-like conduction can coexist, giving rise …