Camargo-Martínez Jose Alfredo, González-Pedreros Guillermo Iván, Mesa Fredy
Grupo de Investigación en Ciencias Básicas, Aplicación e Innovación CIBAIN, Unitrópico, Yopal 850002, Colombia.
Grupo de Ciencias e Ingeniería CEI, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia.
Int J Mol Sci. 2024 Nov 22;25(23):12549. doi: 10.3390/ijms252312549.
The Cooper-pair distribution function Dcp(ω,Tc) of Untwisted-Misaligned Bilayer Graphene (UMBLG) in the presence of an external electric field is calculated and analysed within the framework of first-principle calculations. A bilayer graphene structure is proposed using a structural geometric approximation, enabling the simulation of a structure rotated at a small angle, avoiding a supercell calculation. The Dcp(ω,Tc) function of UMBLG indicates the presence of the superconducting state for specific structural configurations, which is consistent with the superconductivity in Twisted Bilayer Graphene (TBLG) reported in the literature. The Dcp(ω,Tc) function of UMBLG suggests that Cooper-pairs are possible in the low-frequency vibration region. Furthermore, the structural geometric approximation allowed the evaluation of the effect of the electric field on the superconducting state of UMBLG and its superconducting critical temperature through the Ncp parameter.
在第一性原理计算框架内，对存在外部电场时的非扭转-错位双层石墨烯（UMBLG）的库珀对分布函数Dcp(ω,Tc)进行了计算和分析。使用结构几何近似提出了一种双层石墨烯结构，能够模拟小角度旋转的结构，避免了超胞计算。UMBLG的Dcp(ω,Tc)函数表明特定结构构型存在超导态，这与文献中报道的扭转双层石墨烯（TBLG）中的超导性一致。UMBLG的Dcp(ω,Tc)函数表明在低频振动区域可能存在库珀对。此外，结构几何近似允许通过Ncp参数评估电场对UMBLG超导态及其超导临界温度的影响。
