First principles investigation of the spin transport properties in graphene-porphine-graphene nanojunctions |
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| Authors: | Yi Liu Huicai Zhong |
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| Institution: | 1. Department of Physics, Zunyi Medical University, Zunyi, People’s Republic of China;2. School of Science, Chongqing University of Posts and Telecommunications, Chongqing, People’s Republic of China helloliuy@163.com;4. Integrated Circuit Advanced Process Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, People’s Republic of China |
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| Abstract: | The spin-dependent transport properties of a porphine molecule linking with two zigzag-edged graphene nanoribbon (ZGNR) electrodes have been investigated by using the density of functional theory (DFT) combined with the non-equilibrium Green’s function (NEGF) method. The device shows clearly negative differential resistance (NDR), large tunnelling magnetoresistance (TMR) of 103 magnitude and nearly 100% perfect spin filter efficiency (SFE) properties, respectively. What’s more, the projected density of states (PDOS), molecular projected self-consistent Hamiltonian (MPSH) eigenvalues and transmission eigenstates were carried out to discuss the transport properties of the ZGNR/Porphine/ZGNR nanojunction. These results suggest that the ZGNR/Porphine/ZGNR device is a promising candidate for multi-functional spintronic devices. |
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| Keywords: | Porphine graphene spin transport negative differential resistance |
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