Anisotropic spin transport and photoresponse characteristics detected by tip movement in magnetic single-molecule junction
作者机构：Shandong Key Laboratory of Medical Physics and Image Processing&Shandong Provincial Engineering and Technical Center of Light ManipulationsSchool of Physics and ElectronicsShandong Normal UniversityJinan 250358China
出 版 物：《Chinese Physics B》 (中国物理B（英文版）)
年 卷 期：2024年第33卷第4期
页 面：640-648页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学]
基 金：Project supported by the National Natural Science Foundation of China (Grant Nos.11974217,12204281,and 21933002) the Shandong Provincial Natural Science Foundation (Grant No.ZR2022QA068)
主 题：molecular spintronics spin polarization tunneling magnetoresistance photocurrent single-molecule junctions
摘 要：Orientation-dependent transport properties induced by anisotropic molecules are enticing in single-molecule ***,using the first-principles method,we theoretically investigate spin transport properties and photoresponse characteristics in trimesic acid magnetic single-molecule junctions with different molecular adsorption orientations and electrode contact *** transport calculations indicate that a single-molecule switch and a significant enhancement of spin transport and photoresponse can be achieved when the molecular adsorption orientation changes from planar geometry to upright *** maximum spin polarization of current and photocurrent in upright molecular junctions exceeds 90%.Moreover,as the Ni tip electrode moves,the tunneling magnetoresistance of upright molecular junctions can be increased to 70%.The analysis of the spin-dependent PDOS elucidates that the spinterfaces between organic molecule and ferromagnetic electrodes are modulated by molecular adsorption orientation,where the molecule in upright molecular junctions yields higher spin *** theoretical work paves the way for designing spintronic devices and optoelectronic devices with anisotropic functionality base on anisotropic molecules.
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