Tunneling evidence for spatial location of the charge-density-wave induced band splitting in1T−TaSe2

We present the atomically resolved room temperature scanning-tunneling microscopy study of bias dependent images of charge density waves (CDWs) in $1T\text{−}\mathrm{Ta}{\mathrm{Se}}_2$. With the help of angle-resolved photoemission of the CDW-split $\mathrm{Ta}{d}_{z^2}$ band in $1T\text{−}\mathrm{Ta}{\mathrm{Se}}_2$, we determine the electronic location of $\mathrm{Ta}{d}_{z^2}$ subbands on inequivalent atoms of the reconstructed Ta plane. We thus demonstrate the atomic origin of the CDW-formation related effects observed in the band structure of this material.