Strain-Enhanced Spin Injection in Amine-Ended Single-Molecule Magnetic Junctions

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題名:	Strain-Enhanced Spin Injection in Amine-Ended Single-Molecule Magnetic Junctions
作者:	唐毓慧;Tang, Y. -H;Lin, C. -J
貢獻者:	理學院物理學系
關鍵詞:	benzene;cobalt;electrodes;energy;gold;magnetism;mechanical stress;physical chemistry
日期:	2016-01-21
上傳時間:	2026-04-23 14:27:34 (UTC+8)
出版者:	American Chemical Society
摘要:	摘要： The first-principles calculation with the nonequilibrium Green’s function formalism is employed to comprehensively demonstrate that the mechanical strain and anchoring group are two crucial impacts on spin transport in single-molecule magnetic junctions. For the dissociated amine-ended benzene contacted to cobalt electrodes, we present the strain-enhanced spin injection efficiency, including sign reversal and nearly perfect spin injection under junction stretching process. The underlying mechanism is the strain-assisted movement of pronounced and broad spin-up transmission feature toward the Fermi energy. This intriguing finding reveals the superior spin transfer in amine-ended single-molecule magnetic junction, which is in sharp contrast to the better charge transfer between gold electrodes in traditional thiol-ended molecular junctions. Our calculation results may pave the way for promising tunability of spin injection efficiency under mechanical stimulus of break junction technique. 其他題名： J. Phys. Chem. C 出版者： American Chemical Society 出版日期： 2016-01-14 出處： Journal of physical chemistry. C, 2016-01, Vol.120 (1), p.692-696 資源來源： American Chemical Society Journals 版權： Copyright © 2015 American Chemical Society 識別號： ISSN: 1932-7447 識別號： ISSN: 1932-7455 識別號： EISSN: 1932-7455 識別號： DOI: 10.1021/acs.jpcc.5b09700
顯示於類別:	[物理學系] 期刊論文

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