Pressure induced superconducting dome in LaNiGa2.

LaNiGa₂ is a time-reversal symmetry breaking superconductor with symmetry protected band crossings, making it an ideal platform for investigating the interplay between unconventional superconductivity and electronic structure topology. Here we present a transport study of LaNiGa₂ under pressure. The application of pressure to LaNiGa₂ induces a significant enhancement of the superconducting transition temperature T_c at a pressure of 7 GPa. In contrast, powder X-ray diffraction (XRD) results show no evidence of structural phase transitions up to 26.3 GPa. Moreover, the ratio of band diffusivity shows a sudden increase at around 7 GPa, suggesting possible pressure-induced changes in the electronic structure that are closely linked to the evolution of superconductivity. [ABSTRACT FROM AUTHOR]