Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 489-494. doi: 10.1088/1674-0068/20/04/489-494
Citation: Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 489-494. doi: 10.1088/1674-0068/20/04/489-494

Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study

doi: 10.1088/1674-0068/20/04/489-494
Funds:  This work was partially supported by the Na-tional Natural Science Foundation of China(No.10674121, No.10574119, No.50121202, andNo.20533030), the National Key Basic Research Pro-gram (No.2006CB922000), the USTC-HP HPC project,and the SCCAS and Shang
  • Received Date: 2007-06-24
  • Rev Recd Date: 2007-07-11
  • The electronic and transport properties of the Z-shaped graphene nanoribbons heterojunction are investigated by a fully self-consistent nonequilibrium Green's function method combined with density functional theory. The first-principles calculations show that the robust quantum confinement effect in the junction can be used to design the quantum dot. The electronic states are confined by the topological structure of the junction. This kind of Z-shapedquantum dot can be realized regardless of doping impurity, edge chemical modification, and the length of junction. Moreover, the spatial distribution and the number of confined states are tunable.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study

doi: 10.1088/1674-0068/20/04/489-494
Funds:  This work was partially supported by the Na-tional Natural Science Foundation of China(No.10674121, No.10574119, No.50121202, andNo.20533030), the National Key Basic Research Pro-gram (No.2006CB922000), the USTC-HP HPC project,and the SCCAS and Shang

Abstract: The electronic and transport properties of the Z-shaped graphene nanoribbons heterojunction are investigated by a fully self-consistent nonequilibrium Green's function method combined with density functional theory. The first-principles calculations show that the robust quantum confinement effect in the junction can be used to design the quantum dot. The electronic states are confined by the topological structure of the junction. This kind of Z-shapedquantum dot can be realized regardless of doping impurity, edge chemical modification, and the length of junction. Moreover, the spatial distribution and the number of confined states are tunable.

Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 489-494. doi: 10.1088/1674-0068/20/04/489-494
Citation: Quantum Dot Based on Z-shaped Graphene Nanoribbon: A First-principles Study[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 489-494. doi: 10.1088/1674-0068/20/04/489-494

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