Effect of pressure on the superconductivity of Rb0.19WO3

Manuel Nunez-Regueiro (1) , Daniele-Cristina Silva-De-Freitas , René Brusetti , Jacques Marcus (2)

1 NEEL - MagSup - Magnétisme et Supraconductivité
2 NEEL - AUTOCARAC - Automatisation & caractérisation

We have performed electrical resistivity measurements under pressures up to 20GPa between 1 and 300K on monocrystalline hexagonal Rb0.19WO3. For pressures lower than ~5GPa, we observe a decrease of the metallic-like resistivity at room temperature as well as a small decrease of Tc. At this pressure, the resistivity starts to increase slowly up to 10GPa accompanied by a sharper decrease of Tc .The resistivity curves above 10GPa denote an activated behaviour and a Tc lower than 3K indicating that there is a phase transition that takes place gradually between 5 and 10GPa. We interpret our measurements as the result of structural transformations under high pressure.

Domaines: Supraconductivité [cond-mat.supr-con]

Manuel Nunez-Regueiro, Daniele-Cristina Silva-De-Freitas, René Brusetti, Jacques Marcus. Effect of pressure on the superconductivity of Rb0.19WO3. Solid State Communications, 2013, 159, pp.26-28. ⟨10.1016/j.ssc.2013.01.012⟩. ⟨hal-00966140⟩