Anomalous Properties in the Normal and Superconducting States of LaRu₃Si₂

2011/09/12 by Sheng Li, Bin Zeng, Xiangang Wan +5 · 2 citations
Physics and Astronomy · #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.84.214527

published as Phys. Rev. B84, 214527(2011) · 5 pages, 5 figures

arxiv created 2011/09/12 · arxiv updated 2012/03/23

Abstract

Superconductivity in LaRu₃Si₂ 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 = γ_n+βT²-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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