Anomalous Properties in the Normal and Superconducting States of LaRu$_3$Si$_2$

Details Anomalous Properties in the Normal and Superconducting States of LaRu$_3$Si$_2$ Anomalous Properties in the Normal and Superconducting States of LaRu$_3$Si$_2$

2011-09-12

arxiv.org/abs/1109.2525v1

Phys. Rev. B84, 214527(2011)

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.84.214527

Superconductivity in LaRu$_3$Si$_2$ with the honeycomb structure of Ru atoms has been investigated. It is found that the normal state specific heat C/T exhibits a deviation from the Debye model down to the lowest temperature. A relation $C/T = \gamma_n+\beta T^2-ATlnT$ which concerns the electron correlations can fit the data very well. The suppression to the superconductivity by the magnetic field is not the mean-field like, which is associated well with the observation of strong superconducting fluctuations. The field dependence of the induced quasiparticle density of states measured by the low temperature specific heat shows a non-linear feature, indicating the significant contributions given by the delocalized quasiparticles.

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