Shen Xiao-Yun et al 2008 Chinese Phys. Lett. 25 683 doi:10.1088/0256-307X/25/2/089
Shen Xiao-Yun1, Dong Bing1 and Lei Xiao-lin1
Show affiliationsWe study the effect of electron-phonon interaction on current and zero-frequency shot noise in resonant tunnelling through a series triple-quantum-dot coupling to a local phonon mode by means of a nonperturbative mapping technique along with the Green function formulation. By fixing the energy difference between the first two quantum dots to be equal to phonon frequency and sweeping the level of the third quantum dot, we find a largely enhanced current spectrum due to phonon effect, and in particular we predict current peaks corresponding to phonon-absorption and phonon-emission assisted resonant tunnelling processes, which show that this system can be acted as a sensitive phonon-signal detector or as a cascade phonon generator.
63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials
Condensed matter: electrical, magnetic and optical
Issue 2 (February 2008)
Received 11 April 2007
Shen Xiao-Yun et al 2008 Chinese Phys. Lett. 25 683
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