Fig. 1: Atomic structure, STM image and the FT images of the (001) surface of CoSi.
From: Chirality locking charge density waves in a chiral crystal
a Crystalline structure of CoSi. b Large-scale STM image of CoSi (001) surface showing stripe-like modulations. The black arrows mark the crystalline symmetry directions. Scanning settings: Vs = −200 mV, It = 0.4 nA. c Fourier transformed image of (b). The black dashed square outlines the 2D Brillouin zone of the surface. Bragg spots and high-symmetry points of the square lattice are outlined by blue circles and brown dots, respectively. Around the Г point, two sharp peaks associated with the stripe modulation can be differentiated, as highlighted by red arrows. d Zoom-in image of the 2D Brillouin zone. The red arrow marks the CDW wave vector Qcdw. The angle between Qcdw and kx direction is 31 ± 2°.
