| Abstrakt: |
To investigate the Nanoelectronic properties of Carbon nanotube (CNT) devices, Density Functional Theory (DFT) is combined with the Non-Equilibrium Green's Function (NEGF). The present study is an endeavor to calculate the transmission coefficient T(E) as a function of CNT length for all devices (Gold-CNT-Gold). The findings show that for both CNT(9,0) and (10,0), the T(E) decreases as the length of the CNT increases. According to the dominated HOMO for (9,0) and dominated LUMO for (10,0), Seebeck S signs vary from a positive value for (9,0) to a negative value for (10,0), resulting in CNT (9,0) as p-type semiconductors and CNT (10,0) as n-type semiconductors. Thus, with increasing the CNT length, the electronic thermal conductivity K decreases. [ABSTRACT FROM AUTHOR] |
