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Technology Group Research Article Article ID: igmin193

Current Oscillations and Resonances in Nanocrystals of Narrow-gap Semiconductors

Semiconductor Technology
ND Zhukov *
Affiliation

Affiliation

    Limited Liability Company “NPP Volga”. Saratov, Russia

DOI10.61927/igmin193 Fulltext HTML Fulltext PDF Cite this article
DOI10.61927/igmin193 Fulltext HTML Fulltext PDF Cite this article

Abstract

In single colloidal nanocrystals of narrow-gap semiconductors PbS and InSb, current instability in the form of quasi-periodic spikes and current resonance peaks was studied by measuring on a scanning probe microscope and analyzing Current-Voltage Characteristics (CVC). The observed phenomena are explained in models of the wave de Broglie process and Bloch oscillations. Statistically, the percentages of such samples and the parameters of oscillations on the current-voltage characteristic are higher, the larger the size quantization parameter, determined by the de Broglie wavelength. A possible practical use is the generation and recording of terahertz radiation modulated by ultrashort pulses.

Figures

Current-voltage characteristics for different variants of nanocrystals: 1, 1* – NC-InSb; 2 – NC-HgSe; 4 – NC-PbS; 3, 3*– NC-CdSe; 5 – micro-InSb. Figure 1: Current-voltage characteristics for different vari...
a: – fragments of the current-voltage characteristic for NC-PbS, in the inset – a typical dependence of the differential conductivity; the numbers above the curves are the calculated values ​​of the dimensions an for the cases q = 2 (upper) and q = 3 (lower); b – fragments of the current-voltage characteristic for NC-InSb, numbers above the curves – calculated values ​​of the dimensions an for the cases q = 1 (upper) and q = 2 (lower). Figure 2: a: – fragments of the current-voltage characteri...
Current-voltage characteristics for variants of nanocrystals of narrow-gap semiconductors: a – NC-PbS, b – NC-InSb. In the insets, the approximation parameters are: a – y = 2.76x-1.51, R2 = 0.994; b – y = 2.59x-1.34, R2 = 0.994. Figure 3: Current-voltage characteristics for variants of na...
Dependence of ∆Vi on parameter i for a typical case an/a0 ~10: 1 – NC-HgSe; 2 – NC-InSb; 3 – NC-PbS; 4 – NC-CdSe. Figure 4: Dependence of ∆Vi on parameter i for a typical c...

References

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