Fig. 1: Crystal structure of Mo3Al2C.
From: Polar charge density wave in a superconductor with crystallographic chirality
a Crystal structure of Mo3Al2C showing one C3 axis and three C2 axis perpendicular to the three-fold axis. b Resistivity of Mo3Al2C on the (1 0 0) surface recorded in the cooling-down process (blue squares) and warming-up process (red circles). The inset of (b) shows the resistivity around superconducting transition temperature. Raman spectra of Mo3Al2C on a polished (1 0 0) surface in the XX (c), \({X}^{{\prime} }{Y}^{{\prime} }\) (d), and XY (e) scattering geometries at 312 K and 26 K. The black solid lines as well as the red and blue shaded areas are the fitting results. Temperature dependent selected area electron diffraction patterns of Mo3Al2C single crystal along [1 1 0]c/[1 \(\bar{1}\)\(\bar{4}\)]h (f) and [0 0 1]c/[1 \(\bar{1}\) 2]h (g), revealing superlattice Bragg peaks below T*. The subscript c and h denote the cubic and hexagonal notations, respectively.
