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arXiv 2107.06604cond-mat.supr-con
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双能隙超导体ZrB12中的棋盘型电荷条纹

Checkerboard-type patterns of charge stripes in two-gap superconductor ZrB12

N. B. Bolotina, O. N. Khrykina, A. N. Azarevich, N. Yu. Shitsevalova, V. B. Filipov, S. Yu. Gavrilkin, K. V. Mitsen, N. E. Sluchanko

摘要:

本文用热容和X射线衍射(XRD)数据研究了高质量ZrB_(12)单晶(Tc = 6 K)的非均匀超导电性。在沿晶体[110]轴方向施加磁场的情况下,得到了具有两个上临界场Hc 2(Tc)分支的双带超导性的证据。相反,在H //[100]处,观察到唯一的依赖性Hc 2(Tc)。这一发现补充了棋盘式图案的电荷条纹在ZrB 12推导出的XRD数据的详细分析。这些模式进行比较的弱约束超导体LuB 12,其Tc是15倍低于ZrB 12的电荷条纹的结构。本文讨论了强增强特性的ZrB_(12)双能隙超导电性的可能性质。

英文摘要:

Inhomogeneous superconductivity in the high quality single crystals of ZrB12 (Tc = 6 K) has been studied using the heat capacity and x-ray diffraction (XRD) data. Evidence of two-band superconductivity with two branches of upper critical field Hc2(Tc) is obtained in a magnetic field applied along the [110] axis of the crystal. On the contrary, at H //[100], the only dependence Hc2(Tc) is observed. This finding is supplemented with the checkerboard-type patterns of the charge stripes in ZrB12 deduced from the detailed analysis of XRD data. These patterns are compared to the structure of the charge stripes in the weakly bound superconductor LuB12, whose Tc is 15 times lower than that of ZrB12. Probable nature of the two-gap superconductivity in ZrB12 with strongly enhanced characteristics is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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