Electronic and Elastic Properties of Helical Nickel Nanowires
WANG Bao-Lin1,2,3, ZHAO Ji-Jun4, SHI Da-Ning2, JIA Jian-Min2, WANG Guang-Hou3
1Department of Physics, Huaiyin Institute of Technology, Huaiyin 223001
2Department of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
3National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093
4Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Electronic and Elastic Properties of Helical Nickel Nanowires
WANG Bao-Lin1,2,3;ZHAO Ji-Jun4;SHI Da-Ning2;JIA Jian-Min2;WANG Guang-Hou3
1Department of Physics, Huaiyin Institute of Technology, Huaiyin 223001
2Department of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
3National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093
4Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Abstract： The structural and elastic properties of ultrathin nickel nanowires are investigated by using molecular dynamics simulation with a Sutton--Chen potential. Helical multi-shell structures are obtained as the most stable structures for Ni nanowires with diameters of about 1nm. The electronic states of these nanowires are computed and compared with that of Ni solid. The mechanical responses of the helical nanowires under tensile forces are simulated. We observe elastic deformation of nanowires characterized by periodic oscillations of the nanowire length under constant force. Within an elastic limit, both the atomic structures and the electronic structures remain stable under external tensile loading.
2005, Vol. 22 
