考虑引线耦合时传输系数的广义Caroli公式
A generalized Caroli formula for transmission coefficient with lead-lead coupling
摘要:
我们提出了一个广义的传输系数公式的铅结铅系统,其中已考虑到之间的相互作用的铅。在此基础上,可以很容易地恢复Caroli公式,从而得到弹道系统中界面问题的透射系数公式。对公式的有效性条件进行了仔细的探讨。我们主要关注热传输。然而,相应的电输运可以类似地处理。文中还举例说明了公式中所用量的确切含义,如不同情况下的约化相互作用矩阵的概念。此外,基于导出的界面公式,得到了一般一维界面设置的透射系数显式公式。
英文摘要:
We present a generalized transmission coefficient formula for the lead-junction-lead system, in which interaction between the leads has been taken into account. Based on it the Caroli formula could be easily recovered and a transmission coefficient formula for interface problem in the ballistic system can be obtained. The condition of validity for the formula is carefully explored. We mainly focus on heat transport. However, the corresponding electrical transport could be similarly dealt with. Also, an illustrative example is given to clarify the precise meaning of the quantities used in the formula, such as the concept of the reduced interacting matrix in different situations. In addition, an explicit transmission coefficient formula for a general one-dimensional interface setup is obtained based on the derived interface formula.
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