蜂窝晶格上掺杂带绝缘体的非常规配对：非连通费米面的作用及其在超导$β$ -MNCl（M=Hf，Zr）中的应用
Unconventional Pairing in Doped Band Insulators on a Honeycomb Lattice : the Role of the Disconnected Fermi Surface and a Possible Application to Superconducting $β$-MNCl (M=Hf,Zr)
摘要：
我们研究了在正方形晶格和蜂窝晶格上的掺杂带绝缘体中实现非常规超导的可能性，由于费米面的不连通性，后者被认为是一个很好的候选者。我们建议将该理论应用于掺杂层状氮化物$β$ NCl（$M=$ Hf，Zr）的超导电性.最后，我们比较了两组具有不连续费米面的超导体，$β$ NCl和铁磷属元素化物，它们具有高的$T_c$，尽管存在一些对超导性不利的缺陷。
英文摘要：
We investigate the possibility of realizing unconventional superconductivity in doped band insulators on the square lattice and the honeycomb lattice, where the latter is found to be a good candidate due to the disconnectivity of the Fermi surface. We propose applying the theory to the superconductivity in doped layered nitride $β$-$M$NCl ($M=$Hf, Zr). Finally, we compare two groups of superconductors with disconnected Fermi surface, $β$-$M$NCl and the iron pnictides, which have high $T_c$ despite some faults against superconductivity are present.
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