Effect of pressure on the superconductivity of Rb0.19WO3

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,...

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Bibliographic Details
Published inSolid state communications Vol. 159; pp. 26 - 28
Main Authors Núñez-Regueiro, M., Freitas, D.C., Brusetti, R., Marcus, J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2013
Elsevier
Subjects
A. Oxides
C. Pressure
Condensed Matter
D. Phase transitions
D. Superconductivity
Physics
Superconductivity
D. Phase transitions
C. Pressure
A. Oxides
D. Superconductivity
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Summary: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. ► First transport measurements under pressure on a superconducting compound of the WO3 family. ► Phase transition under pressure inducing dramatic changes in transport and superconductivity. ► Passage from a metallic towards an activated behaviour related to a change of the superconducting Tc.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2013.01.012