Fig. 4.

Unidirectional character of the 3D CDW. Zero-field-background subtracted diffraction intensity maps of ortho-VIII (A) and ortho-II (B) in high magnetic fields and in the hl-reciprocal plane (Upper). (Lower) The projected intensities along ($1.68,0,l$) (blue open triangles) and ($\mathrm{0,1.68},l$) (blue closed triangles) in ortho-VIII and ($1.67,0,l$) (red open circles) and ($\mathrm{0,1.67},l$) (red closed circles) in ortho-II. The projected intensity is obtained by integrating the signal within the window indicated by the dashed lines in A and B, Upper and Fig. 1C. Solid lines are Gaussian fits to the data.