新型超高载流子迁移率的二维材料X2B6预测OA

This study aims to predict a new class of two-dimensional materials X2B6(X=K,Na,Rb)and systematically explore their application potential in electronic devices and catalysis.Using first-principles calculations based on density functional theory,combined with phonon spectrum analysis and molecular dynamics simulations,the stability,mechanical properties,electronic structure,carrier mobility,and catalytic performance of the materials were comprehensively evaluated.The results indicate that all X2B6 monolayers exhibit good dynamic and thermal stability,with Young's moduli ranging from 296 to 406 N/m,demonstrating anisotropic mechanical characteristics.Band structure analysis reveals that Na2B6 is a direct bandgap semiconductor with a bandgap of approximately 0.42 eV,featuring ultra-high electron mobility(9 942 cm2·V-1·s-1)and excellent light absorption capability,whereas K2B6 and Rb2B6 ex-hibit metallic properties.Furthermore,X2B6 shows low Gibbs free energy in both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),indicating significant catalytic activity.These findings suggest that X2B6 holds great promise for applications in high-performance electronic devices and efficient catalysis.