Year: 1982
Type: article
Abstract: Conductivity and Hall coefficient measurements for the intercalation complexes formed between TiSe 2 and hydrazine show that there is substantial filling of the titanium d band. For the most metallic complex, of stoichiometry TiSe 2 (N 2 H 4 ) 0.6 , which shows n-type conduction, the effective carrier concentration in the layers is approximately 7*10 21 cm -3 , and good metallic behaviour is observed on cooling, with rho (295K)/ rho (4.2K) approximately 18. Similar behaviour is seen in the V-doped materials V 0.01 Ti 0.99 Se 2 and V 0.03 Ti 0.97 Se 2 . These values imply an increase in the Ti d band filling of approximately 0.45 electrons, and an average valence state for the hydrazine of +0.75. The structural phase transition seen in the unintercalated materials is observed in partially deintercalated samples at the same temperatures as in the pristine materials, 200K for TiSe 2 and 160K for V 0.01 Ti 0.99 Se 2 .
Authors: M Sarma, A R Beal, S Nulsen, R H Friend
Institution: University of Cambridge
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2046658037