Constants

$ h$ ... PLANCK's constant $ 6.6260755 \times 10^{-34}$Js
$ \hbar$ ... Reduced PLANCK's constant $ h / (2 \, \pi)$
$ {\mathrm{k_B}}$ ... BOLTZMANN's constant $ 1.380662 \times 10^{-23}$JK$ ^{-1}$
$ \ensuremath {\mathrm{q}}$ ... Elementary charge $ 1.6021892 \times 10^{-19}$C
$ \ensuremath{\mathrm{m}}_0$ ... Electron rest mass $ 9.1093897 \times 10^{-31}$kg
$ \varepsilon_0$ ... Dielectric constant of vacuum $ 8.8541878 \times 10^{-12}$AsV$ ^{-1}$m$ ^{-1}$
$ i$ ... $ \sqrt{-1}$  

M. Pourfath: Numerical Study of Quantum Transport in Carbon Nanotube-Based Transistors