Fig. 1: Basic properties of TaTe4.
a, b Crystal structure of TaTe4 in the front view (a) and top view (b). The green plane indicates the cleavage plane. Black and red lines indicate the superlattices of the \(2a\times 2a\times 3{\rm{c}}\) CCDW and \(\sqrt{2}a\times \sqrt{2}a\times 3{\rm{c}}\) CDW states. c Magnetic susceptibility of TaTe4 as a function of temperature. The red and blue lines are guides to eyes for the change of the slope near \({T}_{{\rm{CCDW}}}=450{\rm{K}}\). d Raman scattering spectra at selected temperatures from 130 K to 503 K. e, f Calculated band structure of TaTe4 in the normal state without (e) and with (f) spin-orbit coupling (SOC). The inset shows the band structure along ΓZ near the Fermi level (EF) with the black arrow indicating the CDW wavevector.
