Thermal expansion and effect of pressure on superconductivity in CuxTiSe2

Details Thermal expansion and effect of pressure on superconductivity in CuxTiSe2 Thermal expansion and effect of pressure on superconductivity in CuxTiSe2

2007-02-07

arxiv.org/abs/cond-mat/0702184v1

Physics

Condensed Matter

Materials Science

Scientific paper

We report measurements of thermal expansion on a number of polycrystalline CuxTiSe2 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 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. T_c 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.

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