  TiSe2 is a known Topological semimetal (TSM) having both the semi-metallic
and topological characters simultaneously and the Charge density wave (CDW) at
below 200K. In the current short article, we study the impact of Pd addition on
the CDW character of TiSe2 and the possible induction of superconductivity at
low temperatures. Bulk samples of TiSe2 and Pd0.1TiSe2 are synthesized by
solid-state reaction route, which is further characterized by powder X-ray
diffraction (PXRD) and field emission scanning electron microscopy (FESEM),
respectively, for their structural and micro-structural details. The
vibrational modes of both samples are being analyzed by Raman spectroscopy,
showing the occurrence of both A1g and Eg modes. CDW of pure TiSe2 seen at
around 200K in electrical transport measurements, in terms of sharp
semi-metallic to metallic transition peak with hysteresis in cooling/warming
cycles is not seen in Pd0.1TiSe2, and rather a near metallic transport is seen
down to 2K. Although superconductivity is not seen down to 2K, the CDW
transition is seemingly completely suppressed in Pd0.1TiSe2. Pd addition in
TiSe2 suppresses CDW drastically. Trials are underway to induce
superconductivity in Pd-added TiSe2. Density functional theory (DFT)
calculations show primary evidence of suppression of CDW by adding Pd in TiSe2
due to an increase in the density of states.
