Uniaxial pressure study of charge density wave ordering and crystal structure in BaNi2As2

BaNi2As2 exhibits a variety of structural and electronic phases which can easily be tuned by chemical substitution. These include a superconducting phase as well as an incommensurate and commensurate charge density wave (IC-, C-CDW) in an orthorhombic and triclinic structure, respectively. The recent observation of an electronic nematic phase by elastoresistance measurements and linking of the IC-CDW to the orthorhombic phase suggest that this system could be very efficiently tuned by uniaxial pressure, as supported by recent model calculations. Here, we propose to investigate the uniaxial pressure dependence of the various phases of BaNi2As2.