A Reduced-Order Method for Coherent Transport Using Green's Functions

作者：Hetmaniuk Ulrich^*; Ji Dong; Zhao Yunqi; Anantram Manjeri P

来源：IEEE Transactions on Electron Devices, 2015, 62(3): 736-742.

DOI：10.1109/TED.2015.2395420

• Device modeling
• graphene
• quantum transport
• reduced-order method (ROM)

A reduced-order method is presented to efficiently calculate Green's functions connecting contacts or leads to all the points in a nanostructure in the coherent transport limit. The proposed approach samples a small subset of spatial grid points on the lead and a small subset of energy grid points to build a reduced-order model. The efficacy of the algorithm is demonstrated by applying it to calculate both the electron density and transmission in a resonant tunneling structure, a MOSFET, and a bilayer graphene device. The match in features of both the electron density and transmission versus energy with conventional methods to model devices is excellent while a large reduction in computational time is demonstrated.

• 出版日期2015-3