Abstract
In this paper, we study spin transport properties of silicene structures such as ribbons and superlattices with the Kane–Mele model. We investigate the effects of ferromagnetic and antiferromagnetic exchange fields, vertical and transverse electric fields and defects on the band structure, density of states, as well as conductance of the system. Our calculated results indicate that by applying a vertical electric field and/or an antiferromagnetic exchange field, metal–semimetal and also metal–semiconductor quantum phase transitions occur. We show that a zigzag silicene ribbon, when exposed to a transverse electric field in combination with an antiferromagnetic exchange field, behaves as a half-metal that allows one spin state electrons to move. Furthermore, under a vertical electric field and in the simultaneous presence of ferromagnetic and antiferromagnetic exchange fields applied to two half-widths of the ribbon, we observe the half-metallic phase. Our results help to control spin currents and to have new applications in silicene spintronics.
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References
Vogt P, De Padova P, Quaresima C, Avila J, Frantzeskakis E, Asensio MC, Resta A, Ealet B, Le Lay G (2012) Silicene, compelling experimental evidence for graphenelike two-dimensional silicon. Phys Rev Lett 108:155501
Feng B, Ding Z, Meng S, Yao Y, He X, Cheng P, Chen L, Wu K (2012) Evidence of silicene in honeycomb structures of silicon on Ag (111). Nano Lett 12:3507–3511
Fleurence A, Friedlein R, Ozaki T, Kawai H, Wang Y, Yamada-Takamura Y (2012) Experimental evidence for epitaxial silicene on diboride thin films. Phys Rev Lett 108:245501
Meng L, Wang Y, Zhang L, Du S, Wu R, Li L, Zhang Y, Li G, Zhou H, Hofer WA, Gao HJ (2013) Buckled silicene formation on Ir (111). Nano Lett 13:685–690
Tao L, Cinquanta E, Chiappe D, Grazianetti C, Fanciulli M, Dubey M, Molle A, Akinwande D (2015) Silicene field-effect transistors operating at room temperature. Nat Nanotechnol 10:227–231
Ezawa M (2012) A topological insulator and helical zero mode in silicene under an inhomogeneous electric field. New J Phys 14:033003
Tabert CJ, Nicol EJ (2013) Valley-spin polarization in the magneto-optical response of silicene and other similar 2D crystals. Phys Rev Lett 110:197402
Shakouri Kh, Simchi H, Esmaeilzadeh M, Mazidabadi H, Peeters FM (2015) Tunable spin and charge transport in silicene nanoribbons. Phys Rev B 92:035413
Ezawa M (2012) Valley-polarized metals and quantum anomalous Hall effect in silicene. Phys Rev Lett 109:055502
Khoeini F, Shakouri Kh, Peeters FM (2016) Peculiar half-metallic state in zigzag nanoribbons of MoS 2: spin filtering. Phys Rev B 94:125412
Mahdavifar Maryam, Khoeini Farhad (2018) Highly tunable charge and spin transport in silicene junctions: phase transitions and half-metallic states. Nanotechnology 29:325203
Xu C, Luo G, Liu Q, Zheng J, Zhang Z, Nagase S, Gaoa Z, Lu J (2012) Giant magnetoresistance in silicene nanoribbons. Nanoscale 4:3111–3117
Pan H, Li Z, Liu CC, Zhu G, Qiao Z, Yao Y (2014) Valley-polarized quantum anomalous Hall effect in silicene. Phys Rev Lett 112:106802
Wang R, Ren X, Yan Z, Jiang LJ, Sha WEI, Shan GC (2019) Graphene based functional devices: a short review. Front Phys 14:13603
Khoeini F, Shokri AA, Farman H (2009) Electronic transport through superlattice-like disordered carbon nanotubes. Solid State Commun 149:874–879
Khoeini Farhad, Shokri AA (2010) Electronic transport through superlattice-graphene nanoribbons. Eur J Phys B 75:505–509
Shokri AA, Khoeini F (2010) Electron localization in superlattice-carbon nanotubes. Eur J Phys B 78:59–64
Khoeini Farhad (2015) Combined effect of oriented strain and external magnetic field on electrical properties of superlattice-graphene nanoribbons. J Phys D Appl Phys 48:405501
Khoeini Farhad (2015) Effect of uniaxial strain on electrical conductance and band gap of superlattice-graphene nanoribbons. Superlattices Microstruct 81:202–214
Chen CH, Li WW, Chang YM, Lin CY, Yang SH, Xu Y, Lin YF (2018) Negative-differential-resistance devices achieved by band-structure engineering in silicene under periodic potentials. Phys Rev Appl 10:044047
Kaloni TP, Tahir M, Schwingenschlögl U (2013) Quasi free-standing silicene in a superlattice with hexagonal boron nitride. Sci Rep 3:3192
Jia TT, Zheng MM, Fan XY, Su Y, Li SJ, Liu HY, Chen G, Kawazoe Y (2015) Band gap on/off switching of silicene superlattice. J Phys Chem C 119:20747–20754
Niu ZP, Zhang YM, Dong S (2015) Enhanced valley-resolved thermoelectric transport in a magnetic silicene superlattice. New J Phys 17:073026
Missault N, Vasilopoulos P, Peeters FM, Van Duppen B (2016) Spin-and valley-dependent miniband structure and transport in silicene superlattices. Phys Rev B 93:125425
Zhang Q, Chan KS, Li J (2016) Electrically controllable sudden reversals in spin and valley polarization in silicene. Sci Rep 6:33701
Datta S (1997) Electronic transport in mesoscopic systems. Cambridge University Press, Cambridge
Sancho MPL, Sancho JML, Rubio J (1984) Quick iterative scheme for the calculation of transfer matrices: application to Mo (100). J Phys F 14:1205
Sancho MPL, Sancho JML, Sancho JML, Rubio J (1985) Highly convergent schemes for the calculation of bulk and surface Green functions. J Phys F 15:851
Liu CC, Jiang H, Yao Y (2011) Low-energy effective Hamiltonian involving spin-orbit coupling in silicene and two-dimensional germanium and tin. Phys Rev B 84:195430
Li TC, Lu SP (2008) Quantum conductance of graphene nanoribbons with edge defects. Phys Rev B 77:085408
Nakada K, Fujita M, Dresselhaus G, Dresselhaus MS (1996) Edge state in graphene ribbons: nanometer size effect and edge shape dependence. Phys Rev B 54:17954
Zhang Y, Tang T-T, Girit C, Hao Z, Martin MC, Zettl A, Crommie MF, Shen YR, Wang F (2009) Direct observation of a widely tunable bandgap in bilayer graphene. Nat (Lond) 459:820–823
Van Duppen B, Vasilopoulos P, Peeters FM (2014) Spin and valley polarization of plasmons in silicene due to external fields. Phys Rev B 90:035142
Lang XY, Zheng WT, Jiang Q (2006) Size and interface effects on ferromagnetic and antiferromagnetic transition temperatures. Phys Rev B 73:224444
Hillebrecht FU, Ohldag H, Weber NB, Bethke C, Mick U, Weiss M, Bahrdt J (2001) Magnetic moments at the surface of antiferromagnetic NiO (100). Phys Rev Lett 86:3419
Duò L, Finazzi M, Ciccacci F (2010) Magnetic properties of antiferromagnetic oxide materials: surfaces, interfaces, and thin films. Wiley, Hoboken
He X, Wang Y, Wu N, Caruso AN, Vescovo E, Belashchenko KD, Dowben PA, Binek C (2010) Robust isothermal electric control of exchange bias at room temperature. Nat Mater 9:579–585
Kampfrath T, Sell A, Klatt G, Pashkin A, Mahrlein S, Dekorsy T, Wolf M, Fiebig M, Leitenstorfer A, Huber R (2011) Coherent terahertz control of antiferromagnetic spin waves. Nat Photon 5:31–38
Pati SP, Al-Mahdawi M, Ye S, Shiokawa Y, Nozaki T, Sahashi M (2016) Finite-size scaling effect on Neel temperature of antiferromagnetic Cr2O3 (0001) films in exchange-coupled heterostructures. Phys Rev B 94:224417
Wu SM, Zhang W, Borisov AKCP, Pearson JE, Jiang JS, Lederman D, Hoffmann A, Bhattacharya A (2016) Antiferromagnetic spin Seebeck effect. Phys Rev Lett 116:097204
Son Y-W, Cohen ML, Louie SG (2006) Half-metallic graphene nanoribbons. Nat (Lond) 444:347–349
Feng J-H, Li G, Meng X-F, Jian X-D, Dai Z-H, Zhao Y-C, Zhou Z (2019) Computationally predicting spin semiconductors and half metals from doped phosphorene monolayers. Front Phys 14:43604
Correa JH, Pezo A, Figueira MS (2018) Braiding of edge states in narrow zigzag graphene nanoribbons: effects of third-neighbor hopping on transport and magnetic properties. Phys Rev B 98:045419
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Khoeini, F., Jafarkhani, Z. Tunable spin transport and quantum phase transitions in silicene materials and superlattices. J Mater Sci 54, 14483–14494 (2019). https://doi.org/10.1007/s10853-019-03928-4
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DOI: https://doi.org/10.1007/s10853-019-03928-4