Modeling Electronic and Thermal Characteristics of Ge/Si-Core/Shell   Nanowire Quantum Dot in the Coulomb Blockade Regime
  We investigate the transport characteristics of Ge/Si-Core/Shell nanowire with Coulomb Blockade in presence of external magneto-electric fields from a theoretical basis. Using the effective Luttinger-Kohn Hamiltonian we calculate the valence band energy states of the nanowire and find out the state density at mili-Kelvin temperature. We explore the current-voltage and conductance-voltage characteristics. The observed transport characteristics are in close agreement with experimental data. We find these characteristics to be sensitive to the coupling of the quantum dot with the reservoirs. The quantum nature of the characteristics becomes less prominent with increasing temperature, as expected. 
Shah Mohammad Bahauddin, Nafiz Ishtiaque, Ishtiza Ibne Azad, Zahid   Hasan Mahmood
cond-mat.mes-hall