论文标题
液化六角硼硝化硼双层中的非绝热超导性
Nonadiabatic superconductivity in Li-intercalated hexagonal boron nitride bilayer
论文作者
论文摘要
在液化的六角硼氮化硼双层（LI-HBN）的情况下，无法省略电子phonon相互作用的顶点校正。 This is evidenced by the very high value of the ratio $λω_{D}/\varepsilon_{F}\sim 0.46$, where $λ$ is the electron-phonon coupling constant, $ω_{D}$ is the Debye frequency, and the symbol $\varepsilon_{F}$ represents the Fermi energy.由于非绝热效应，LI-HBN中声子诱导的超导状态的特征是临界温度的值要低得多（$ t^{\ rm lovc} _ {c} \ in \ in \ in \ {19.1，19.1，15.5，15.5，15.5，11.8 \}比计算不考虑这种效果的结果：$ t^{\ rm me} _ {c} \ in \ {31.9，26.9，26.9，21 \} $ k。从技术的角度来看，$ t_ {c}的低价值限制了li-hbn超多加管属性的可能应用。这些计算是根据经典的Migdal-Eliashberg形式主义（ME）和以最低级顶点校正（LOVC）进行的Eliashberg理论进行的。
In the case of Li-intercalated hexagonal boron nitride bilayer (Li-hBN), the vertex corrections of electron-phonon interaction cannot be omitted. This is evidenced by the very high value of the ratio $λω_{D}/\varepsilon_{F}\sim 0.46$, where $λ$ is the electron-phonon coupling constant, $ω_{D}$ is the Debye frequency, and the symbol $\varepsilon_{F}$ represents the Fermi energy. Due to the nonadiabatic effects, the phonon-induced superconducting state in Li-hBN is characterized by the much lower value of critical temperature ($T^{\rm LOVC}_{C}\in\{ 19.1, 15.5, 11.8\}$ K, for $μ^{\star}\in \{0.1, 0.14, 0.2\}$), than would result from calculations not taking this effect into account: $T^{\rm ME}_{C}\in\{ 31.9, 26.9, 21\}$ K. From the technological point of view, the low value of $T_{C}$ limits the possible applications of Li-hBN superconducting properties. The calculations were carried out under the classic Migdal-Eliashberg formalism (ME) and the Eliashberg theory with the lowest-order vertex corrections (LOVC).
