Phys. Rev. Lett. 93,107401 (2004)
This paper presents the quantum transport calculation of photocurrents in carbon nanotube p-n junctions under light illumination using a nonequlibrium Green function method along with the nearest-neighbor tight binding approximation.
The photon-electron interaction is taken into account by adding a self energy into the effective Hamiltonian of central scattering region.
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