Impurity Effect on Superconducting Properties in Molecular Substituted Organic Superconductor $\kappa$-(ET)$_2$Cu(NCS)$_2$

Naoki Yoneyama; Takahiko Sasaki; Hajime Oizumi; Norio Kobayashi

doi:10.1143/JPSJ.76.123705

Impurity Effect on Superconducting Properties in Molecular Substituted Organic Superconductor $\kappa$-(ET)$_2$Cu(NCS)$_2$

Superconductivity 2009-11-13 v1 Strongly Correlated Electrons

Authors: Naoki Yoneyama , Takahiko Sasaki , Hajime Oizumi , Norio Kobayashi

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Abstract

We report an impurity effect in the organic superconductor $\kappa$ -(ET) $_2$ Cu(NCS) $_2$ by substitution of the ET molecule with an analogue, bis(methyleneditio)tetrathiafulvalene (MT). The superconducting transition temperature decreases with increasing substitution. The in-plane magnetic penetration depth is enhanced with substitution, which is quantitatively attributed to the decrease in the in-plane mean free path. The enhancement of the penetration depth can also explain the reduction of the effective pinning in terms of the condensation energy.

Keywords

organic superconductor impurity effect $\kappa$-(ET)$_2$Cu(NCS)$_2$ superconducting transition temperature magnetic penetration depth mean free path flux pinning

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@article{arxiv.0709.3172,
  title  = {Impurity Effect on Superconducting Properties in Molecular Substituted Organic Superconductor $\kappa$-(ET)$_2$Cu(NCS)$_2$},
  author = {Naoki Yoneyama and Takahiko Sasaki and Hajime Oizumi and Norio Kobayashi},
  journal= {arXiv preprint arXiv:0709.3172},
  year   = {2009}
}

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4 pages, submitted to J. Phys. Soc. Jpn

Impurity Effect on Superconducting Properties in Molecular Substituted Organic Superconductor $\kappa$-(ET)$_2$Cu(NCS)$_2$

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