论文标题
c轴热膨胀和晶格崩溃的符号变化，在CO1-XNIXZR2超导体中替代
Sign change in c-axis thermal expansion and lattice collapse by Ni substitution in Co1-xNixZr2 superconductors
论文作者
论文摘要
我们研究了CO1-XNIXZR2的结构，电子和超导特性，其中C轴热膨胀是系统地控制的。在x（小于）0.3时，观察到C轴阴性热膨胀（NTE），并且随着x的增加，热膨胀常数αC接近零。在x = 0.4-0.6时，观察到零热膨胀，X（大于）0.7的阳性热膨胀（PTE）出现。通过分析C/A比，我们观察到在X = 0.6-0.8左右的四方晶格中可能折叠过渡。晶格塌陷导致C轴PTE和块超导性的抑制。
We investigated the structural, electronic, and superconducting properties of Co1-xNixZr2, in which c-axis thermal expansion is systematically controlled. At x (smaller than) 0.3, c-axis negative thermal expansion (NTE) was observed, and the thermal expansion constant αc approached zero with increasing x. At x = 0.4-0.6, zero thermal expansion was observed, and positive thermal expansion (PTE) appeared for x (greater than) 0.7. By analyzing the c/a ratio, we observed a possible collapsed transition in the tetragonal lattice at around x = 0.6-0.8. The lattice collapse results in c-axis PTE and the suppression of bulk superconductivity.
