Thermal expansion and effect of pressure on superconductivity in CuxTiSe2

TitleThermal expansion and effect of pressure on superconductivity in CuxTiSe2
Publication TypeJournal Article
Year of Publication2007
AuthorsBud'ko SL, Canfield PC, Morosan E, Cava RJ, Schmiedeshoff GM
Journal TitleJournal of Physics-Condensed Matter
Date PublishedMay
Type of ArticleArticle
ISBN Number0953-8984
Accession NumberISI:000246556400042
Keywordsdependence, temperature, TISE2, TRANSITION-METAL DICHALCOGENIDES

We report measurements of thermal expansion on a number of polycrystalline Cu-x TiSe2 samples corresponding to the parts of x-T phase diagram with different ground states, as well as the pressure dependence of the superconducting transition temperature, Tc, for samples with three different values of Cu doping. Thermal expansion data suggest that the x-T phase diagram may be more complex than initially reported. Tc data at elevated pressure can be scaled to the ambient pressure CuxTiSe2 phase diagram; however, significantly different scaling factors are needed to accommodate the literature data on the charge density wave transition suppression under pressure.

Alternate JournalJ. Phys.-Condes. Matter