论文标题
单晶性手性超导体候选srptas的电阻和热力学特性的差异
Differences in the Resistive and Thermodynamic Properties of the Single Crystalline Chiral Superconductor Candidate SrPtAs
论文作者
论文摘要
$ \ require {Mediawiki-Texvc} $建议本地非中心超级导体SRPTAS主持拓扑性手性$ D $ - 波状态，但实验报告仅限于多晶样品。在这里，我们报告了从Pb通量生长的单晶srptas的合成。 srptas在六角形空间群中结晶$ p6_ {3} $/$ mmc $带有晶格参数$ a $ = 4.2445（4）$Å$和$ c $ = 8.9513（18）$Å$。磁化率和电阻率测量结果显示，在T $ _C $ $ \ sim $ 2.2 K处的超导过渡与以前关于多晶样品的报告一致。出乎意料的是，热容量数据显示在0.7 K处的大量过渡仅是一个小的大量转变。我们讨论了各种测量值之间差异的可能起源。
$\require{mediawiki-texvc}$The locally non-centrosymmetric superconductor SrPtAs is proposed to host a topological chiral $d$-wave state, but experimental reports have been limited to polycrystalline samples. Here we report the synthesis of single crystalline SrPtAs grown from Pb flux. SrPtAs crystallizes in the hexagonal space group $P6_{3}$/$mmc$ with lattice parameters $a$ = 4.2445(4) $Å$ and $c$ = 8.9513(18) $Å$. Magnetic susceptibility and electrical resistivity measurements reveal a superconducting transition at T$_c$ $\sim$2.2 K, in agreement with previous reports on polycrystalline samples. Surprisingly, heat capacity data show only a small bulk transition at 0.7 K. We discuss the possible origins of the discrepancy between the various measurements.
