Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe<sub>3−<italic>x</italic></sub>Se<sub><italic>x</italic></sub>

Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe_3−xSe_x

Cui Shan¹, He Lan-Po¹, Hong Xiao-Chen¹, Zhu Xiang-De^{2, 4}, Petrovic Cedomir⁴, Li Shi-Yan^{1, 3, †,}

(a) The normalized dc magnetization of ZrTe_2.956Se_0.044 and ZrTe_2.949Se_0.051 single crystals, measured in H = 20 Oe with zero-field-cooled (ZFC) process. (b) The in-plane resistivity of ZrTe_2.956Se_0.044 and ZrTe_2.949Se_0.051 single crystals. No anomaly is observed in the normal state, suggesting the complete suppression of CDW state. (c) The resistive superconducting transition at low temperature. For clarity, the resistance of the x = 0.044 sample is magnified by five times. The T_c defined by ρ = 0 is 4.06 K and 3.87 K for x = 0.044 and 0.051 samples, respectively.