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Synthesis of electron transmission in nanoscale semiconductor devices
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10.1063/1.2159102
/content/aip/journal/apl/88/1/10.1063/1.2159102
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/1/10.1063/1.2159102
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Figures

Image of FIG. 1.
FIG. 1.

A rectangular potential barrier of energy and width gives rise to rapid increase in electron transmission with increasing voltage bias, and resonances. Effective electron mass is , where is the bare electron mass. (a) Conduction band profile of the rectangular potential barrier for the indicated values of . (b) Transmission probability as a function of for an electron of energy incident from the left.

Image of FIG. 2.
FIG. 2.

(a) and (c) are solutions from exhaustive numerical searches for conduction band profiles that yield linear and square dependences of electron transmission as a function of bias voltage, . is constrained to a region that is 10 nm wide and the maximum local potential is 0.3 eV. The resulting for an electron of energy incident from the left are shown as solid line in (b) and (d). Broken line is target response.

Image of FIG. 3.
FIG. 3.

(a) Evolution from a single potential barrier to an array of barriers. (b) for the potentials in (a). The superposition of broad resonances enables a linear transmission-voltage response. (i) single rectangular barrier of 4 nm, (ii) 4 nm wide barrier with a step, (iii) same as (ii) plus 1 nm wide small barrier, (iv) optimized potential profile. (c) Changes of 1–2 monolayers at the initial highest barrier mainly alters the slope of the transmission curve, i.e., the resistance. (d) Randomly selected 0, , and monolayer changes at all interfaces only lead to small deviations in . The characteristic variation in is .

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/content/aip/journal/apl/88/1/10.1063/1.2159102
2006-01-03
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Synthesis of electron transmission in nanoscale semiconductor devices
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/1/10.1063/1.2159102
10.1063/1.2159102
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