I’m new here. I have started looking into writing my own modified drift-diffusion transport simulation (for 2D material devices). Doing so I have stumbled across the simple physics drift-diffusion example.
Jn = “ElectronChargemu_nEdgeInverseLengthV_tkahan3(Electrons@n1Bern01, Electrons@n1vdiff, -Electrons@n0*Bern01)”
To understand the expression for the electron current I searched the literature a bit on the scharfetter gummel discretization. I found the following article: http://mx.nthu.edu.tw/~jlliu/proj/Device/SGMethod.pdf
From the article I am able to understand the use of the Bernoulli expression in the expression for the electrone (and hole) current. It is however unclear to me where the term
comes from, as it is not present in the given article.
Would you mind helping me out here?