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Symmetry-dependent transport properties and magnetoresistance in zigzag silicene nanoribbons
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10.1063/1.4726276
/content/aip/journal/apl/100/23/10.1063/1.4726276
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/23/10.1063/1.4726276
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) and (b) Structure of 6-ZSiNR (a) and 7-ZSiNR (b) from top view (upper) and cross section view (lower). Edge atoms are passivated by H. (c) Schematic of the two probe system. (d) I-V plot for 6-ZSiNR and 7-ZSiNR. (e) Transmission spectra for 6-ZSiNR (lower) and 7-ZSiNR (upper) under a bias voltage of 0.3 V. The energy region between vertical dashed lines corresponds to the bias window. G 0 equals to e 2/h.

Image of FIG. 2.
FIG. 2.

(a) Band structure of 6-ZSiNR. (b) Wavefunctions of the π and π* bands for 6-ZSiNR at the Γ point. Different colors indicate different signs. (c) The band structures for left and right electrodes, and the transmission spectrum of 6-ZSiNR with 0.3 V bias. (d)-(f) The same as (a)-(c) but for 7-ZSiNR. The dashed lines in (b) correspond to the two fold axis in 6-ZSiNR, whereas it is absent in 7-ZSiNR. The dashed arrow in (c) means the transmission is forbidden, and the shadow shows the energy region of the forbidden transmission. The solid arrow in (f) means the transmission is allowed. The horizontal dashed lines in (c) and (f) indicate the bias window. G 0 equals to e 2/h.

Image of FIG. 3.
FIG. 3.

(a) Band structure of FM 6-ZSiNR. The spin up and spin down components are presented in red and blue, respectively. (b) and (c) Spin density for 6-ZSiNR with P and AP configurations under zero bias. The two electrodes have parallel spin configuration in the P case but anti-parallel spin configuration in the AP case. Pink and blue surfaces denote the spin up and spin down components, respectively. The isosurface corresponds to 0.01 e/Å3. (d) The I-V curves for the P and AP configurations. The inset is semi-logarithmic scale plot. (e) The spin up, spin down, and total magnetoresistance on semi-logarithmic scale. (f) and (g) The band structures for left and right electrodes, and the transmission spectrum for P (f) and AP (g) configurations under zero bias. Solid and open circles denote π and π* states. Solid arrows indicate allowed transmissions, and dashed arrows indicate forbidden transmissions. G 0 equals to e 2/h.

Image of FIG. 4.
FIG. 4.

Schematic illustration of logic gates based on FM ZSiNR with even N. For input, spin up and spin down polarizations represent logic 1 and 0, respectively. For output, low resistance and high resistance states represent logic 1 and 0, respectively.

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/content/aip/journal/apl/100/23/10.1063/1.4726276
2012-06-08
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Symmetry-dependent transport properties and magnetoresistance in zigzag silicene nanoribbons
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/23/10.1063/1.4726276
10.1063/1.4726276
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