摘要
石墨烯量子点因其独特的电子特性和显著的量子限域效应,在纳米电子器件和量子模拟领域展现出重要的应用前景。本研究关注的是分层门控量子点结构,其内部门控电压不是均匀分布的,可划分为具有不同电压值的多个功能层。这种特殊结构在高精度、低功耗晶体管设计中可能具有独特优势。我们提出一种迭代算法,能够精确计算电子经量子点散射后的空间概率分布。为验证算法有效性,我们采用12层分层门控量子点模拟电压沿径向连续变化的量子点的电子散射问题,后者可以通过其他成熟算法得到严格解。数值计算结果表明,两种途径得到的散射电子空间密度分布高度吻合,证明了我们提出的算法的可靠性。
Graphene quantum dots(GQDs)demonstrated significant potential in nanoelectronic devices and quantum simula-tion due to their unique electronic properties and pronounced quantum confinement effects.This study focused on a layered-gate quantum dot structure featuring non-uniform internal gate voltage distribution,which could be partitioned into multiple functional layers with distinct voltage values.Such a specialized architecture was found to offer unique advantages for high-precision,low-power transistor designs.We developed an iterative algorithm capable of precisely calculating the spatial probability distribu-tion of electrons scattered by quantum dots.To validate the algorithm’s effectiveness,we employed a 12-layer gated quantum dot structure to simulate electron scattering problems in radially continuous voltage-varying quantum dots,the latter system that could be rigorously solved by other established algorithms.Numerical results showed excellent agreement between the spatial electron den-sity distributions obtained through both approaches,confirming the reliability of our proposed method.
作者
汪佳欣
杜骏杰
WANG Jiaxin;DU Junjie(School of Physics and Electronic Science,East China Normal University,Shanghai 200041,China)
出处
《南昌大学学报(理科版)》
2025年第5期453-458,共6页
Journal of Nanchang University(Natural Science)
基金
上海自然科学基金面上项目(24ZR1417700)。
