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A Penetration Depth Study on Li2Pd3B and Li2Pt3B | | H. Q. Yuan
; D. Vandervelde
; M. B. Salamon
; P. Badica
; K. Togano
; | | Date: |
29 Jun 2005 | | Subject: | Superconductivity | cond-mat.supr-con | | 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. | | Source: | arXiv, cond-mat/0506771 | | Services: | Forum | Review | PDF | Favorites | |
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