First-principles study of structure and quantum transport properties of C20 fullerene
Yi-Peng AnLudong University College of Physics and Electronic Engineering, , Yantai 264025, People’s Republic of ChinaChuan‐Lu YangLudong University College of Physics and Electronic Engineering, , Yantai 264025, People’s Republic of ChinaMei‐Shan WangLudong University College of Physics and Electronic Engineering, , Yantai 264025, People’s Republic of ChinaXiao‐Guang MaLudong University College of Physics and Electronic Engineering, , Yantai 264025, People’s Republic of ChinaDehua WangLudong University College of Physics and Electronic Engineering, , Yantai 264025, People’s Republic of China
2009en
ABI
Abstract
Using first-principles density-functional theory and nonequilibrium Green's function formalism for quantum transport calculation, we study the electronic and transport properties of C(20) fullerene molecule. Our results show that the equilibrium conductance of C(20) molecule is near 1G(0). It is found that the I-V curve displays a linear region centered about V = 0 and nonlinear behavior under higher bias voltages and an obvious negative differential resistance phenomenon in a certain bias voltage range. The mechanism for the negative differential resistance behavior of C(20) is suggested. The present findings could be helpful for the application of the C(20) molecule in the field of single molecular devices or nanometer electronics.
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