Calculation of electron transport in multiterminal systems using complex absorbing potentials
Calculation of electron transport in multiterminal systems using complex absorbing potentials
复制标题
使用复吸收势计算多端系统中的电子传输
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K. Varga
中科院分区：
文献类型：
--
作者：
Brandon Cook;Peter Dignard;K. Varga
提出了一种计算多端系统传输系数ffi的方法。通过在半Infinite引线的哈密顿量中加入复数吸收势，将finite维矩阵的求逆问题转化为finite维本征值问题。使用这种方法，一次计算所有能量的传输CoE、ffi、cient。通过一个可解析求解的模型系统，验证了该方法的准确性。给出了四端石墨烯交叉结和六端碳纳米管结的数值算例。
A method to calculate the transmission coefficient in multi-terminal systems is presented. By adding a complex absorbing potential to the Hamiltonian of the semi-infinite leads, the problem of inverting an infinite dimensional matrix is transformed into a finite dimensional eigenvalue problem. Using this approach transmission coefficients are calculated for all energies at once. The accuracy of the approach is demonstrated with an analytically solvable model system. Numerical examples of a four-terminal graphene cross junction and six-terminal carbon nanotube junction are presented.