عنوان مقاله [English]
نویسنده [English]چکیده [English]
In this study, we investigate the spin polarized current in a zigzag hexagonal phosphorene quantum dot composed of and phosphorus atoms using Green's function method. Supposing that all input electrons have spin-up orientation, we have shown that an output current with desirable spin polarization may be achieved by applying an appropriate external electric field controlled by a gate voltage. Particularly, there are conditions where the spin of all electrons can be inverted; therefore, the system can act as a spin inverter that has special applications in spintronics and quantum computations. Moreover, it is demonstrated that increasing the size of phosphorene quantum dot leads to the increase of polarized current.
 K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S.V. Dubonos, I.V. Grigorieva, A.A. Firsov, Electric field effect in atomically thin carbon films, science, 306 (2004) 666-669.
 A.C. Neto, F. Guinea, N.M. Peres, K.S. Novoselov, A.K. Geim, The electronic properties of graphene, Reviews of modern physics 81 (2009) 109.
 A.K. Geim, K.S. Novoselov, The rise of graphene, in, Nanoscience and Technology: A Collection of Reviews from Nature Journals, World Scientific (2010) 11-19.
 R. Zhang, X. Zhou, D. Zhang, W. Lou, F. Zhai, K. Chang, Electronic and magneto-optical properties of monolayer phosphorene quantum dots, 2D Materials 2 (2015) 045012.
 L. Li, Y. Yu, G.J. Ye, Q. Ge, X. Ou, H. Wu, D. Feng, X.H. Chen, Y. Zhang, Black phosphorus field-effect transistors, Nature nanotechnology, 9 (2014) 372.
 X. Niu, Y. Li, H. Shu, J. Wang, Anomalous size dependence of optical properties in black phosphorus quantum dots, The journal of physical chemistry letters 7 (2016) 370-375.
 J. Zhang, H. Liu, L. Cheng, J. Wei, J. Liang, D. Fan, J. Shi, X. Tang, Q. Zhang, Phosphorene nanoribbon as a promising candidate for thermoelectric applications, Scientific reports 4 (2014) 6452.
 E.T. Sisakht, M.H. Zare, F. Fazileh, Scaling laws of band gaps of phosphorene nanoribbons: A tight-binding calculation, Physical Review B 91 (2015) 085409.
 X. Zhang, H. Xie, Z. Liu, C. Tan, Z. Luo, H. Li, J. Lin, L. Sun, W. Chen, Z. Xu, Black phosphorus quantum dots, Angewandte chemie international edition 54 (2015) 3653-3657.
 S. Datta, Electronic transport in mesoscopic systems: Cambridge university press, (1997).
D.A. Ryndyk, Theory of Quantum Transport at Nanoscale, Springer Series in Solid-State Sciences, 184 (2016).
 F. Fallah, M. Esmaeilzadeh, Spin transport properties in an organic molecule in the presence of Rashba spin-orbit interaction, AIP Advances 1 (2011)032113.