We study electrical modulation of transport properties of silicene nanoconstrictions with different geometrical structures.We investigate the effects of the position and width of the central scattering region on the c...We study electrical modulation of transport properties of silicene nanoconstrictions with different geometrical structures.We investigate the effects of the position and width of the central scattering region on the conductance with increasing Fermi energy.It is found that the conductance significantly depends on the position and the width of the nanoconstriction.Interestingly,the symmetrical structure of the central constriction region can induce a resonance effect and significantly increase the system’s conductance.We also propose a novel two-channel structure with an excellent performance on the conductance compared to the one-channel structure with the same total width.Such geometrically-induced conductance modulation of silicene nanostructures can be achieved in practice via current nanofabrication technology.展开更多
陆相石油是中国石油储量和产量的主要贡献者,陆相石油的勘探对象经历了湖盆区外粗粒沉积储层为主、湖岸线附近粗-中粒沉积储层为主的常规石油,正在向湖盆区内细粒沉积储层为主的非常规页岩油气全面迈进(图1).深湖区发育的以粉砂、泥质...陆相石油是中国石油储量和产量的主要贡献者,陆相石油的勘探对象经历了湖盆区外粗粒沉积储层为主、湖岸线附近粗-中粒沉积储层为主的常规石油,正在向湖盆区内细粒沉积储层为主的非常规页岩油气全面迈进(图1).深湖区发育的以粉砂、泥质粉砂、粉砂质泥、黏土和有机质为主的细粒重力流沉积物(粒径<0.0625 mm),是形成深水(湖)细粒沉积的重要搬运和沉积作用方式(Boulesteix et al.,2019),也是陆相页岩油气富集高产的重要储集甜点层类型(图1).深入研究湖盆细粒重力流体系沉积特征和发育机制,系统认识深湖环境细粒重力流体系沉积作用及演化,不仅对深入理解细粒重力流体系形成的特定地质条件及沉积作用过程、促进湖盆细粒重力流沉积学基础理论的创新发展,而且对湖盆区内页岩油气甜点层预测、富集区评价意义重大.展开更多
基金Supported by the National Natural Science Foundation of China(Grant No.11574067)。
文摘We study electrical modulation of transport properties of silicene nanoconstrictions with different geometrical structures.We investigate the effects of the position and width of the central scattering region on the conductance with increasing Fermi energy.It is found that the conductance significantly depends on the position and the width of the nanoconstriction.Interestingly,the symmetrical structure of the central constriction region can induce a resonance effect and significantly increase the system’s conductance.We also propose a novel two-channel structure with an excellent performance on the conductance compared to the one-channel structure with the same total width.Such geometrically-induced conductance modulation of silicene nanostructures can be achieved in practice via current nanofabrication technology.
文摘陆相石油是中国石油储量和产量的主要贡献者,陆相石油的勘探对象经历了湖盆区外粗粒沉积储层为主、湖岸线附近粗-中粒沉积储层为主的常规石油,正在向湖盆区内细粒沉积储层为主的非常规页岩油气全面迈进(图1).深湖区发育的以粉砂、泥质粉砂、粉砂质泥、黏土和有机质为主的细粒重力流沉积物(粒径<0.0625 mm),是形成深水(湖)细粒沉积的重要搬运和沉积作用方式(Boulesteix et al.,2019),也是陆相页岩油气富集高产的重要储集甜点层类型(图1).深入研究湖盆细粒重力流体系沉积特征和发育机制,系统认识深湖环境细粒重力流体系沉积作用及演化,不仅对深入理解细粒重力流体系形成的特定地质条件及沉积作用过程、促进湖盆细粒重力流沉积学基础理论的创新发展,而且对湖盆区内页岩油气甜点层预测、富集区评价意义重大.
