Electron-hole asymmetry in the phase diagram of carrier-tuned CsV${}_3$Sb${}_5$

Abstract

Here we study the effect of electron doping the kagome superconductor CsV${}_3$Sb${}_5$. Single crystals and powders of CsV${}_3$Sb${}_{5-x}$Te${}_x$ are synthesized and characterized via magnetic susceptibility, nuclear quadrupole resonance, and x-ray diffraction measurements, where we observe a slight suppression of the charge density wave transition temperature and superconducting temperature with the introduction of electron dopants. In contrast to hole-doping, both transitions survive relatively unperturbed up to the solubility limit of Te within the lattice. A comparison is presented between the electronic phase diagrams of electron- and hole-tuned CsV${}_3$Sb${}_5$.

11 pages, 4 figures