High pressure study of charge density wave ordering in P-doped BaNi2As2

BaNi2As2 exhibits a variety of electronic phases, encompassing a charge density waves (CDW) which is supressed below a structural transition to a triclinic phase (TS=137 K), in which superconductivity appears (Tc=0.7 K). The interplay between all these phases remains unclear, and to gain further insights, we have recently investigated (proposal HC-4234) the response of the CDW in BaNi2As2 to hydrostatic pressure (HP) using single crystal x-ray diffraction (XRD). The purpose of the present proposal is to extend these measurements to P- doped BaNi2As2 to get insight into the origin of the CDW and their interplay with the other phases.