Short range charge order in Cr-intercalated NbSe2

Transition metal dichalcogenides (TMDs) exhibit a broad range of intriguing physical properties primarily driven by their rich electron-electron and electron-phonon interactions. These interactions give rise to phenomena such as charge density waves (CDWs) and superconductivity. The weakly coupled layered structure of TMDs allows for the intercalation of atoms, offering a powerful method to tune their physical properties. The intercalation of magnetic atoms could lead to the emergence of new electronic phases by for example changing the band structure, phonon dispersion, or introducing spin-orbit coupling. In this talk, we present our experiments on cleaved bulk single crystals of Cr-intercalated 2H-NbSe2 using scanning tunneling microscopy/spectroscopy (STM/S). We find that the introduction of Cr atoms changes the well-known coherent 3 x 3 CDW in pristine bulk NbSe2 into a short-range order with a different spatial geometry. We conclude by discussing possible origins of the observed CDW change.