Low temperature phase transition in the chain-like compounds NbSe3 and TaSe3 |
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| Authors: | P. Haen F. Lapierre P. Monceau M. Núñez Regueiro J. Richard |
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| Affiliation: | Centre de Recherches sur les Très Basses Températures, CNRS, BP 166 X, 38042 Grenoble Cedex, France |
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| Abstract: | New transitions have been observed at low temperature by electrical measurements on the linear trichalcogenides NbSe3 and TaSe3. The resistivity of TaSe3 drops near zero below 1.5 K which may indicate a superconducting transition. The resistivity of NbSe3 drops below 2.2 K by 30 to 75% of its residual value at 4.2 K. However for TaSe3 and NbSe3 initial susceptibility measurements do not show any increase in diamagnetism indicating a flux expulsion. In addition the transitions below the critical temperatures are strongly non-linear with current density higher than 10-3 A mm-2. |
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