Generation of spin current polarization by polarized light in unbiased graphene

Mahnia, Simin; Phirouznia, Arash

doi:10.30473/jphys.2023.68556.1154

Document Type : Research

Authors

Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran.

https://doi.org/10.30473/jphys.2023.68556.1154

Abstract

In this paper, we have modeled and studied a graphene-based system connected to two semi-infinite channels where light (with linear and circular polarizations) shines vertically into the system. Assuming the existence of adjustable Rashba-type spin-orbit coupling caused by the presence of gate voltage, electron and spin transport in the system was investigated. Non-equilibrium Green's function method and tight-binding model have been used for quantum transport calculations. According to the results, it was observed that the spin response is different for the X and Y polarizations, while the two circular polarizations, i.e. right-handed and left-handed, have completely identical behavior in the production of spin polarization. It was also observed that, at zero bias voltage, the amount of electric current generated by light is very low while the generated spin polarization is significantly high. The difference in the spin current created by different polarizations in the system increases with the increase of spin-orbit interaction. Considering the different signs of the spin current for linear polarizations of light in X and Y directions, it can be used as a spin detector of linear polarization of light. It was also observed that the Rashba coupling has no significant effect on the electric current produced by light. At zero bias, the light can produce a weak electric current, the direction of which completely depends on the polarization of the incident light.

Keywords

References

[1] U. Aeberhard, Theory and simulation of quantum photovoltaic devices based on the non-equilibrium Green’s function formalism, J Comput Electron. 10. 2011, 394–413.

[2] A. Fert, Nobel Lecture: Origin, development, and future of spintronics, Rev. Mod. Phys. 80. 2008, 1517.

[3] I. Žutić, J. Fabian, S. Das Sarma, Spintronics: Fundamentals and applications, Rev. Mod. Phys. 76. 2004, 323.

[4] E. W. Hill, A.K. Geim, K. Novoselov, F. Schedin, P. Blake, Graphene Spin Valve Devices. IEEE Trans. Magn. 42. 2006, 2694.

[5] C. Jozsa, M. Popinciuc, N. Tombros, H. T. Jonkman, B. J. van Wees, Electronic Spin Drift in Graphene Field-Effect Transistors, Phys. Rev. Lett. 100. 2008, 236603.

[6] N. M. R. Peres, F. Guinea, A. H. Castro Neto, Coulomb interactions and ferromagnetism in pure and doped graphene. Phys. Rev. B. 72. 2005, 174406

[7] T. O. Wehling, K. S. Novoselov, S. V. Morozov, E. E. Vdovin, M. I. Katsnelson, A. K. Geim, A. I. Lichtenstein, Molecular Doping of Graphene. Nano Lett. 173. 2008, 8

[8] Behnia, Kamran. Polarized light boosts valleytronics, Nature Nanotechnology. 7,. 2012, 488-489.

[9] T.-N. Do, P.-H. Shih, G. Gumbs, D. Huang, C.-W. Chiu, M.-F. Lin, Diverse magnetic quantization in bilayer silicene, Phys. Rev. B. 97. 2018, 125416.

[10] T.-N. Do, G. Gumbs, P.-H. Shih, D. Huang, C.-W. Chiu, C.-Y. Chen, M.-F. Lin, Peculiar optical properties of bilayer silicene under the influence of external electric and magnetic fields, Sci. Rep. 9. 2019, 624.

[11] N. Kheirabadi, A. Shafiekhani, M. Fathipour, Review on graphene spintronic, new land for discovery, Superlattices Microstruct. 74. 2014, 123–145.

[12] A. Kara, C. Léandri, M.E. Dávila, P. De Padova, B. Ealet, H. Oughaddou, B. Aufray, G. Le Lay, Physics of silicene stripes, J. Supercond. Nov. Magn. 22. 2009, 259–263.

[13] T. Saari, "Electronic structure and spin polarization in Silicene nanostructures",. master’s thesis, Finland, Technical University of Tampere, 2013,, 69.

[14] A.H.C. Neto, F. Guinea, N.M.R. Peres, K.S. Novoselov, A.K. Geim, The electronic properties of graphene, Rev. Mod. Phys. 81. 2009, 109.

[15] E. I. Rashba, "Graphene with structure-induced spin-orbit coupling: Spin-polarized states, spin zero modes, and quantum Hall effect." Physical Review B, vol. 79. 2009, 161409.

[16] Petra Dietl, "Numerical Studies of Electronic Transport through Graphene Nanoribbons with Disorder"; thesis, Germany, Institute of Theoretical Solid State Physics, University of Karlsruhe, 2009,, 76.

[17] F. Rahimi, A. Phirouznia. Electric feld induced pure spin‑photo current in zigzag stanene and germanene nanoribbons. Scientific Report 12. 2022,.

[18] Jingtian Fang, William G. Vandenberghe, and Massimo V. Fischetti. Microscopic dielectric permittivities of graphene nanoribbons and graphene. Phys. Rev. B. 94. 2016, 045318.

[19] L.E. Henrickson, Nonequilibrium photocurrent modeling in resonant tunneling photodetectors. J. Appl. Phys. 91. 2002, 6273–6281.

[20] Lei Zhang, Kui Gong, Jingzhe Chen, Lei Liu, Yu Zhu, Di Xiao, and Hong Guo. Physical Review B 90. 2014, 195428.

[21] H. Haug and A.-P. Jauho, "Quantum Kinetics in Transport and Optics of Semiconductors". Springer-Verlag, New York,. 1998,.

[22] S. Datta "Electronic Transport in Mesoscopic Systems". Cambridge University Press, UK.. 1997,.

[23] H. Haug and A.-P. Jauho, Quantum Kinetics in Transport and Optics of Semiconductors. Springer-Verlag, New York.. 1998,.

[24] Mahdi Pourfath. "The Non-Euilibrium Green's Function Methode for Nanoscale Device Simulation". Springer Wien Heidelberg New York Dordrecht London,. 2014,.

[25] T. Farajollahpour, S. Khamouei, S.S. Shateri, A. Phirouznia. Anisotropic Friedel oscillations in graphene-like materials: The Dirac point approximation in wave-number dependent quantities revisited. Scientific Reports 8. 2018, 2667.

[26] Yan-Hong Zhou , Shaohui Yu , Yuejun Li , Xin Luo , Xiaohong Zheng, Lei Zhang. Pure spin current generation with photogalvanic effect in graphene interconnect junctions. Nanophotonics 10, 6. 2021,.

[27] Yuejun Li, Xiaofei Shang, Yan-Hong Zhou, Xiaohong Zheng. Realizing pure spin current by the photogalvanic effect in armchair graphene nanoribbons with nano-constriction engineering. Phys. Chem. Chem. Phys., 25 2023. 2023, 2890-2896.

[28] L. Zhang, J. Chen, L. Zhang, F. Xu, L. Xiao, S. Jia, Gate controllable optical spin current generation in zigzag graphene nanoribbon, Carbon 173. 2021, 565-571.

Quarterly Journal of Optoelectronic

Generation of spin current polarization by polarized light in unbiased graphene

References

References

[27] Yuejun Li, Xiaofei Shang, Yan-Hong Zhou, Xiaohong Zheng. Realizing pure spin current by the photogalvanic effect in armchair graphene nanoribbons with nano-constriction engineering. Phys. Chem. Chem. Phys., 25 2023. 2023, 2890-2896.

Volume 5, Issue 2 - Serial Number 13
August 2023
Pages 45-52

Generation of spin current polarization by polarized light in unbiased graphene

References

References

[27] Yuejun Li, Xiaofei Shang, Yan-Hong Zhou, Xiaohong Zheng. Realizing pure spin current by the photogalvanic effect in armchair graphene nanoribbons with nano-constriction engineering. Phys. Chem. Chem. Phys., 25 2023. 2023, 2890-2896.

Volume 5, Issue 2 - Serial Number 13August 2023Pages 45-52

Volume 5, Issue 2 - Serial Number 13
August 2023
Pages 45-52