FYP 1 ENTRY 2

        Throughout week 5 up to week 6, I read on Zuriana’s thesis and try to replicate what she did. In Zuriana’s thesis, she used armchair graphene nanoribbon (GNR) with width 6 unit atoms wide and the ribbon is repeated for 8 times along C-axis. In her thesis too, she did convert the single layer armchair GNR to bilayer layer armchair GNR. But I only replicate it using single layer GNR.

         Throughout week 7 to week 8, I worked on to get the result simulation of 3p, 3p+1, 3p+2 where the value of p, I choose when p=1 and p=4. The results of the important characteristics that I need to record were Bandstructure, Density of States, IV plot and Transmission Spectrum. The results then I need to replot using MATLAB.

          In week 9, I read another journal of “Graphene-Based Spintronic Components” where now I understand how the spin-up and spin-down in logic gate operate. To produce spin-polarized current, we need to use “half-metallic” materials. The flow of spin-polarized current in ZGNR is controlled by the magnetic configurations of the electrodes where one electrode is magnetized while the other is non-magnetic. Moreover, the result of the logic operation is expressed in terms of output current. Hence wherever the logic output is 1, the output current is include the spin-up current. When logic output is 0, the output current is exclude spin up current which is means the spin-down current. Here is the link: https://arxiv.org/pdf/1010.5634.pdf. My current progress now is, I still find information about the spintronic logic gates method/steps to do in the QuantumATK tools.