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- W3048891312 abstract "The space-charge-limited, steady-state piezoresistance (PZR) in thin device layers of silicon-on-insulator wafers containing a nominal $10^{14}$ cm$^{-3}$ silicon divacancy defects changes sign as a function of applied bias. Above a punch-through voltage ($V_t$) corresponding to the onset of a Mott-Gurney-like hole current, the longitudinal $langle 110 rangle$ PZR $pi$-coefficient is $pi approx 70 times 10^{-11}$ Pa$^{-1}$, similar to the value obtained in charge-neutral, p-type silicon. Below $V_t$ the mechanical stress dependence of the Shockley-Read recombination parameters, specifically the divacancy trap energy $E_T$, yields $pi approx -25 times 10^{-11}$ Pa$^{-1}$. This analysis suggests that anomalous (or inverse) PZR in nano-silicon occurs when currents are recombination limited due to strong reductions in carrier lifetime induced by significant densities of Shockley-Read centers, and when the reduced dimensionality lowers $V_t$ and amplifies space-charge-limited currents." @default.
- W3048891312 created "2020-08-18" @default.
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- W3048891312 date "2020-08-11" @default.
- W3048891312 modified "2023-09-27" @default.
- W3048891312 title "Anomalous, space-charge-limited piezoresistance in defect-engineered silicon" @default.
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