Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2012.2198452
Title: Magnetoresistance in ferromagnetically coupled three-dimensional topological insulator strips
Authors: Siu, Z.B.
Jalil, M.B.A. 
Tan, S.G.
Keywords: Magnetoresistance
Topological insulators
Issue Date: 2012
Source: Siu, Z.B., Jalil, M.B.A., Tan, S.G. (2012). Magnetoresistance in ferromagnetically coupled three-dimensional topological insulator strips. IEEE Transactions on Magnetics 48 (11) : 4250-4252. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2012.2198452
Abstract: In this work, we calculate the eigenstates and dispersion relations for the 2-D surface states of 3-D topological insulator (TI) planar nanostrips of finite width coupled to a proximate insulating ferromagnetic layer. The magnetization of the ferromagnetic layer in the transverse, longitudinal and out-of-plane directions have differing effects on the dispersion relations. We also calculated the transmission through a short central TI strip sandwiched between TI source and drain leads of semi-infinite length. We investigate the transport through the setup when the magnetization of the ferromagnetic layer on top of the central region differs from that of the leads. We found that when the lead magnetization is in the longitudinal direction, i.e., along the current direction, the transmission is maximal for both the parallel and anti-parallel alignment of the lead and central magnetizations. However, for the case where the lead magnetization is in the transverse direction, the transmission is maximal for parallel alignment and minimal for the antiparallel alignment. © 2012 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/56576
ISSN: 00189464
DOI: 10.1109/TMAG.2012.2198452
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