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首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >An atomistic Green's function method hybrid with a substructure technique for coherent phonon analysis
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An atomistic Green's function method hybrid with a substructure technique for coherent phonon analysis

机译:一种原子学绿色的功能方法杂交用子结构技术进行相干声子分析

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摘要

By virtue of substructure technique, the atomistic Green's function method can be applied to efficiently evaluate the coherent phonon transport in a large device. Comprised of several substructures without inner atoms, the device can be described by a small system of algebraic equations, which can give a small but crucial submatrix of the retarded Green's function of the open device without loss in accuracy. While avoiding solving the entire device problem, the method can basically give all the information to describe the quantum transport within the ballistic limit, such as the transmission function and local density of states. The validity and efficiency of the proposed method is demonstrated by the one- and three-dimensional cases. The multilevel substructure technique is also feasible.
机译:借助于子结构技术,可以应用原子的绿色的功能方法以有效地评估大器件中的相干声子传输。 由几个没有内部原子的子结构组成,该装置可以由一个小型的代数方程描述,这可以为开放装置的延迟的绿色功能的小而不,无需精度损失。 虽然避免解决整个设备问题,但该方法基本上可以提供所有信息来描述弹道极限内的量子传输,例如状态的传输功能和局部密度。 拟议方法的有效性和效率由单一和三维案例证明。 多级子结构技术也是可行的。

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