Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep40546
Title: Wave function parity loss used to mitigate thermal broadening in spin-orbit coupled zigzag graphene analogues
Authors: Sadi, M.A 
Liang, G 
Issue Date: 2017
Citation: Sadi, M.A, Liang, G (2017). Wave function parity loss used to mitigate thermal broadening in spin-orbit coupled zigzag graphene analogues. Scientific Reports 7 : 40546. ScholarBank@NUS Repository. https://doi.org/10.1038/srep40546
Abstract: Carrier transport through a graphene zigzag nanoribbon (ZNR) is possible to be blocked by a p-n profile implemented along its transport direction. However, we found that in cases of analogous materials with significant intrinsic spin-orbit coupling (SOC), i.e. silicene and germanene, such a profile on ZNR of these materials allows transmission mostly through spin-orbit coupled energy window due to the loss of the parity of wave functions at different energies caused by SOC. Next, a p-i-n scheme on germanene ZNR is proposed to simultaneously permit edge transmission and decimate bulk transmission. The transmission spectrum is shown to mitigate the effect of thermal broadening on germanene and silicene ZNR based spin-separators by improving spin polarization yield by 400% and 785%, respectively, at 300 K. The importance of proper gate voltage and position for such performance is further elucidated. Finally, the modulation the current output of the proposed U-shape p-i-n device while maintaining its spin polarization is discussed. © The Author(s) 2017.
Source Title: Scientific Reports
URI: https://scholarbank.nus.edu.sg/handle/10635/173948
ISSN: 20452322
DOI: 10.1038/srep40546
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