Commenced in January 2007
Paper Count: 30124
Spin-Dependent Transport Signatures of Bound States: From Finger to Top Gates
Abstract:Spin-orbit gap feature in energy dispersion of one-dimensional devices is revealed via strong spin-orbit interaction (SOI) effects under Zeeman field. We describe the utilization of a finger-gate or a top-gate to control the spin-dependent transport characteristics in the SOI-Zeeman influenced split-gate devices by means of a generalized spin-mixed propagation matrix method. For the finger-gate system, we find a bound state in continuum for incident electrons within the ultra-low energy regime. For the top-gate system, we observe more bound-state features in conductance associated with the formation of spin-associated hole-like or electron-like quasi-bound states around band thresholds, as well as hole bound states around the reverse point of the energy dispersion. We demonstrate that the spin-dependent transport behavior of a top-gate system is similar to that of a finger-gate system only if the top-gate length is less than the effective Fermi wavelength.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1315897Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 379
 D. A. Wharam, T. J. Thornton, R. Newbury, M. Pepper, H. Ahmed, J. E. F. Frost, D. G. Hasko, D. C. Peacock, D. A. Ritchie, G. A. C. Jones, “One-dimensional transport and the quantisation of the ballistic resistance”, J. Phys. C: Solid State Phys., vol. 21, pp.209-214, 1988.
 B. J. van Wees, H. van Houten, C. W. J. Beenakker, J. G. Williamson, L. P. Kouwenhoven, D. van der Marel, C. T. Foxon, “Quantized Conductance of Point Contacts in a Two-Dimensional Electron Gas”, Phys. Rev. Lett., vol. 60, no. 9, pp.848-850, 1988.
 K. J. Thomas, J. T. Nicholls, M. Y. Simmons, M. Pepper, D. R. Mace, and D. A. Ritchie, “Possible Spin Polarization in a One-Dimensional Electron Gas”, Phys. Rev. Lett., vol. 77, no. 1, pp.135-138, 1996.
 J. H. Bardarson, I. Magnusdottir, G. Gudmundsdottir, C.-S. Tang, A. Manolescu, and V. Gudmundsson , “Coherent electronic transport in a multimode quantum channel with Gaussian-type scatterers”, Phys. Rev. B, vol. 70, no. 24, 245308, 2004.
 S. Datta and B. Das, “Electronic analog of the electro-optic modulator”, Appl. Phys. Lett., vol. 56, pp.665-667, 1990.
 M. Governale, D. Boese, U. ZLulicke, and C. Schroll, “Filtering spin with tunnel-coupled electron wave guides”, Phys. Rev. B, vol. 65, no. 14, 140403, 2002.
 A. Aharony, O. Entin-Wohlman, Y. Tokura, and S. Katsumoto, “Spin filtering by a periodic spintronic device”, Phys. Rev. B, vol. 78, no.12, 125328, 2008.
 D. D. Awschalom, D. Loss, and N. Samarth, Semiconductor Sprintronics and Quantum Computation (Springer, Berlin, 2002).
 A. G. Mal’shukov, C. S. Tang, C. S. Chu, and K. A. Chao, “Spin-current generation and detection in the presence of an ac gate”, Phys. Rev. B, vol. 68, no.23, 233307, 2003.
 A. G. Mal’shukov, C. S. Tang, C. S. Chu, and K. A. Chao, “Strain-induced coupling of spin current to nanomechanical oscillations”, Phys. Rev. Lett., vol. 95, no. 10, 107203, 2005.
 J. Nitta, T. Akazaki, H. Takayanagi, and T. Enoki, “Gate Control of Spin-Orbit Interaction in an Inverted In0.53Ga0.47/In0.52Al0.48As Heterostructure”, Phys. Rev. Lett., vol. 78, no. 7, pp.1335-1338, 1997.
 P. S. Eldridge, W. J. H. Leyland, P. G. Lagoudakis, O. Z. Karimov, M. Henini, D. Taylor, R. T. Phillips, and R. T. Harley, “All-optical measurement of Rashba coefficient in quantum wells”, Phys. Rev. B, vol. 77, no. 12, 125344, 2008.
 A. S. Sheremet, O. V. Kibis, A. V. Kavokin, and I. A. Shelykh, “Datta-and-Das spin transistor controlled by a high-frequency electromagnetic field”, Phys. Rev. B, vol. 93, no. 16, 165307, 2016.
 S. D. Ganichev and L. E. Golub, “Interplay of Rashba/Dresselhaus spin splittings probed by photogalvanic spectroscopyVA review”, Phys. Status Solidi B, vol. 251, pp.1801-1823, 2014.
 I. Zailer, J. E. F. Frost, V. Chabasseur-Molyneux, C. J. B. Ford, and M. Pepper, “Crosslinked PMMA as a highresolution negative resist for electron beam lithography and applications for physics of low-dimensional structures”, Semicond. Sci. Technol., vol. 11, pp. 1235-1238, 1996.
 C.-S. Tang, J.-A. Keng, N. R. Abdullah, V. Gudmundsson, “Spin magneto-transport in a RashbaVDresselhaus quantum channel with single and double finger gates”, Phys. Lett. A, vol. 381, pp. 1529-1533, 2017.
 C.-S. Tang, Y.-H. Yu, N. R. Abdullah, V. Gudmundsson, “Transport signatures of top-gate bound states with strong RashbaVZeeman effect”, Phys. Lett. A, vol. 381, pp. 3960-3963, 2017.
 S. Giglberger, L. E. Golub, V. V. Belkov, S. N. Danilov, D. Schuh, C. Gerl, F. Rohlfing, J. Stahl,W.Wegscheider, D.Weiss, W. Prettl, and S. D. Ganichev, “Rashba and Dresselhaus spin splittings in semiconductor quantum wells measured by spin photocurrents”, Phys. Rev. B, vol. 75, no. 3, 035327, 2007.
 C. L´opez-Bastidas, J. A. Maytorena, and F. Mireles, “Interplay of the Rashba and Dresselhaus spin-orbit coupling in the optical spin susceptibility of 2D electron systems”, Phys. Status Solidi C, vol. 4, pp.4229-4235, 2007.
 Y. V. Pershin, J. A. Nesteroff, and V. Privman, “Effect of spin-orbit interaction and in-plane magnetic field on the conductance of a quasi-one-dimensional system”, Phys. Rev. B, vol. 69, no. 12, 121306(R), 2004.
 C. H. L. Quay, T. L. Hughes, J. A. Sulpizio, L. N. Pfeiffer, K.W. Baldwin, K.W.West, D. Goldhaber-Gordon, and R. de Picciotto, “Observation of a one-dimensional spinVorbit gap in a quantum wire”, Nat. Phys., vol. 6, pp.336-339, 2010.
 C.-S. Tang, S. Y. Chang, and S. J. Cheng, “Finger-gate manipulated quantum transport in a semiconductor narrow constriction with spin-orbit interactions and Zeeman effect”, Phys. Rev. B, vol. 86, no. 12, 125321, 2012.
 A. F. Sadreev and E. Ya. Sherman, “Effect of gate-driven spin resonance on the conductance through a one-dimensional quantum wire”, Phys. Rev. B, vol. 88, no. 11, 115302, 2013.
 D. Rainis and D. Loss, “Conductance behavior in nanowires with spin-orbit interaction: A numerical study”, Phys. Rev. B, vol. 90, no. 23, 235415, 2014.
 C.-S. Tang, S.-T. Tseng, V. Gudmundsson, and S.-J. Cheng, “Double-finger-gate controlled spin-resolved resonant quantum transport in the presence of a RashbaVZeeman gap”, J. Phys. Cond. Mat., vol. 27, 085801, 2015.
 R. Landauer, “Electrical resistance of disordered one-dimensional lattices”, Philos. Mag., vol. 21, pp.863-867, 1970.
 M. B¨uttiker, “Quantized transmission of a saddle-point constriction”, Phys. Rev. B, vol. 41, no. 11, pp.7906-7909, 1990.