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(Color online) Field-dependent CI spectra in a Nyquist plot for (a) 113, (b) 327, and (c) composites and (d) SEM image of 113-327 composites. The curves are guide to the eyes.
(Color online) [(a) and (b)] MC ratio of composites for some selected frequency points. The lines are guide to the eyes. (c) Real and (d) negative imaginary parts of complex resistivity spectra of composites at . The dash and dash-dot-dash curves, respectively, indicate the 113-327 interfaces and two different .
(Color online) (a) Real and (b) negative imaginary parts of CI spectra under dc bias application from for 113-327 composites. (c) High-field and (d) low-field MCs as a function of frequency. The long-dash, short-dash, and solid curves, respectively, represent the trap state, leakage-region-induced SP QW effect, and summation of them.
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