Spin-Polarized Negative Differential Resistance in a Self-Assembled Molecular Chain

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• 作者：Ying-Chin Chen ; Shih-Hao Hsu ; Chao-Cheng Kaun ; Minn-Tsong Lin
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：September 11, 2014
• 年：2014
• 卷：118
• 期：36
• 页码：21199-21203
• 全文大小：289K
• ISSN：1932-7455

文摘

By using first-principles calculations, we investigate the electronic structures and transport properties of a self-assembled Fe₂鈥揚TCDA chain. This experimentally observed chain can grow as long as a few tens of nanometers and our calculations suggest that it conducts as a half-metal. Spin-polarized transport properties are attributed to conducting bands of the minority spin near the Fermi energy, raised by the hybridization between orbitals of the molecule and the iron atoms, while a band gap of the majority spin exists. Moreover, this system features a highly spin-polarized negative differential resistance, due to the alignment of conducting bands and the match of their symmetries, which can be integrated to build multifunction spintronic devices.