Doping WS<sub>2</sub> armchair nanoribbons with transition metals
ORAL
Abstract
Armchair WS2 nanoribbons are semiconductors with band gaps close to 0.5 eV. When a W atom is replaced by a transition metal, impurity states can have tremendous effect on the overall electronic structures. By using first-principles calculations based on density functional theory, we investigated substitutional of Ti, V, Cr, Mn, Fe, Co for WS2 ribbons of different widths. We found that Fe-doped ribbons have two-channel conduction separately in the middle part of the ribbon and at the edges. Co-doped ribbons are turned in to spin filters, having 100% spin-polarized conductions. These results should be useful for nano-electronic circuit design.
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Presenters
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Chih-Kai Yang
Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan, ROC
Authors
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Yan-Hong Chen
Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC.
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Chi-Hsuan Lee
Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan, ROC
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Shun-Jen Cheng
Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC.
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Chih-Kai Yang
Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan, ROC