supported by the National Natural Science Foundation of China (Grant No. 60776062);the National Fundamental Fund of Personnel Training (Grant No. J0730317);the Natural Science Foundation of Shanxi Province, China (Grant Nos.2008011001-1 and 2008011001-2)
Taking account of the electron--electron (hole) and electron--hole interactions, the tunneling processes of the main quantum dot (QD) Coulomb-coupled with a second quantum dot embedded in n--n junction have been i...