Trans-polyacetylene based organic spin valve for a multifunctional spin-based device: A first principle analysis

Journal of Science: Advanced Materials and Devices

Anurag Srivastava¹  Kumar Gaurav²  Rajeev Ahuja³  Boddepalli SanthiBhushan⁴  Gonzalo Gutierrez⁵ 

[1] Department of Physics, Indian Institute of Technology, Ropar, Punjab, India;Advanced Materials Research Group, CNT Laboratory, ABV - Indian Institute of Information Technology and Management, Gwalior, M.P., India;Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden;Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Allahabad, U.P., India;Group of Nano Materials, Department of Physics, University of Chile, Santiago, Chile;

关键词: Trans-polyacetylene;    Spintronics;    Spin caloritronics;    Density functional theory (DFT);    Non-equilibrium Green's function (NEGF);   

DOI  :  

来源: DOAJ

【 摘 要 】

Carbon-based materials are the promising candidates for the design of multifunctional spintronic devices, owing to their fascinating inherent attributes such as the ballistic transport nature, long spin coherence time, etc. Here, we report the spin-dependent electron transport properties of a trans-polyacetylene channel sandwiched between two semi-infinite hydrogen-passivated zigzag graphene nanoribbon (ZGNR) electrodes within the framework of spin-polarized density functional theory (DFT) and non-equilibrium Green's function (NEGF) formalisms. The proposed device exhibits an excellent spin-dependent transport behavior within the bias window of [-0.5 V, 0.5 V]. In parallel configuration (PC), the device offers an ideal spin filtration efficiency of almost 100% within the bias range of [-0.4 V, 0.4 V], and in antiparallel configuration (APC), it exhibits negative differential resistance (NDR), dual-spin rectification, and dual-spin filtration effects. Also, a high tunnel magnetoresistance (TMR) of 1.2× 105% is achieved. To validate the aforementioned effects, the transmission spectra along with the area enclosed by the curve, eigenvalues, eigenstates, and quantum conductance have also been analyzed. In addition, the impact of hybridization and torsion defects on the spin-dependent transport phenomenon through trans-polyacetylene has been investigated. Furthermore, the modelled device is observed to exhibit the spin Seebeck effect in PC under the influence of temperature gradient. The proposed device may stand as a good contender for various spintronic and spin caloritronic applications.

【 授权许可】

Unknown