A Penetration Depth Study on Li2Pd3B and Li2Pt3B

H. Q. Yuan; D. Vandervelde; M. B. Salamon; P. Badica; K. Togano

doi:10.1063/1.2354869

A Penetration Depth Study on Li2Pd3B and Li2Pt3B

Superconductivity 2009-11-11 v1

Authors: H. Q. Yuan , D. Vandervelde , M. B. Salamon , P. Badica , K. Togano

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Abstract

In this paper we present a penetration depth study on the newly discovered superconductors Li $_2$ Pd $_3$ B and Li $_2$ Pt $_3$ B. Surprisingly, the low-temperature penetration depth $f(T)$ demonstrates distinct behavior in these two isostructural compounds. In Li $_2$ Pd $_3$ B, $f(T)$ follows an exponential decay and can be nicely fitted by a two-gap BCS superconducting model with a small gap $\delta_1=3.2$ K and a large gap $\delta_2=11.5$ K. However, linear temperature dependence of $f(T)$ is observed in Li $_2$ Pt $_3$ B below 0.3 $T_c$ , giving evidence of line nodes in the energy gap.

Keywords

superconductivity high-temperature superconductivity

Cite

@article{arxiv.cond-mat/0506771,
  title  = {A Penetration Depth Study on Li2Pd3B and Li2Pt3B},
  author = {H. Q. Yuan and D. Vandervelde and M. B. Salamon and P. Badica and K. Togano},
  journal= {arXiv preprint arXiv:cond-mat/0506771},
  year   = {2009}
}

Comments

2 pages, submitted to LT24

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