超导二维铜铋纳米片Cubine
Cubine, a superconducting 2-dimensional copper-bismuth nano sheet
摘要：
我们报告的发现的二维铜铋纳米片从\textit{ab initio}计算，我们称之为cubine。根据我们的预测，单层的立方氮化硼可以从最近报道的高压CuBi块体材料（在环境条件下亚稳态）中分离出来，能量成本仅为$\approx 20$ ~meV/MeV $^2$，与从石墨中分离单层的石墨烯相当。我们的计算表明，立方氮化硼具有显着的电子和电化学性质：它是一个超导体，具有适度的电子-声子耦合$λ=0.5$，导致$T_c$为$\approx1$ ~K，并可以很容易地嵌入锂具有高扩散性，使其成为一个有前途的候选材料作为锂离子电池的阳极。
英文摘要：
We report on the discovery of a 2-dimensional copper-bismuth nano sheet from \textit{ab initio} calculations, which we call cubine. According to our predictions, single layers of cubine can be isolated from the recently reported high-pressure CuBi bulk material (metastable at ambient conditions) at an energetic cost of merely $\approx 20$~meV/Å$^2$, comparable to separating single layers of graphene from graphite. Our calculations suggest that cubine has remarkable electronic and electrochemical properties: It is a superconductor with a moderate electron-phonon coupling $λ=0.5$, leading to a $T_c$ of $\approx1$~K, and can be readily intercalated with lithium with a high diffusibility, rendering it a promising candidate material as an anode in lithium-ion batteries.
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