摘要
Based on first-principles calculations,the bias-induced evolutions of hybrid interface states inπ-conjugated tricene and in insulating octane magnetic molecular junctions are investigated.Obvious bias-induced splitting and energy shift of the spin-resolved hybrid interface states are observed in the two junctions.The recombination of the shifted hybrid interface states from different interfaces makes the spin polarization around the Fermi energy strongly bias-dependent.The transport calculations demonstrate that in theπ-conjugated tricene junction,the bias-dependent hybrid interface states work efficiently for large current,current spin polarization,and distinct tunneling magnetoresistance.But in the insulating octane junction,the spin-dependent transport via the hybrid interface states is inhibited,which is only slightly disturbed by the bias.This work reveals the phenomenon of bias-induced reconstruction of hybrid interface states in molecular spinterface devices,and the underlying role of conjugated molecular orbitals in the transport ability of hybrid interface states.
作者
张令梅
苗圆圆
曹智鹏
邱帅
张广平
任俊峰
王传奎
胡贵超
Ling-Mei Zhang;Yuan-Yuan Miao;Zhi-Peng Cao;Shuai Qiu;Guang-Ping Zhang;Jun-Feng Ren;Chuan-Kui Wang;Gui-Chao Hu(Shandong Provincial Key Laboratory of Medical Physics and Image Processing Technology,School of Physics and Electronics,Shandong Normal University,Jinan 250358,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.11974215,21933002,and 11874242)
the Shandong Provincial Natural Science Foundation,China(Grant No.ZR2019MA043)。