Temperature behavior of multiple tunnel junction devices based on disordered dot arrays

Cordan, A. S.; Leroy, Y.; Goltzené, A.; Pépin, A.; Vieu, Christophe; Mejias, M.; Launois, H.

doi:10.1063/1.371867

Cited by 49 publications

(41 citation statements)

References 18 publications

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“…Monte Carlo simulations have been used to study the effects of certain types of disorder on the conductance in one-dimensional ͑1D͒ and 2D nanoparticle arrays. [6][7][8][9][10] Disorder was taken into account in the form of variations in particle size, capacitative coupling between particles, and offset charges. Unfortunately, these calculations can only be applied to relatively small particle assemblies which poorly resemble a real nanoparticle film.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional percolation effect on electrical conductivity in films of metal nanoparticles linked by organic molecules

et al. 2003

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We study experimentally and theoretically the electrical conductivity of films made of gold nanoparticles linked by alkanedithiol molecules. The dependence of the conductivity on the length of the alkanedithiol molecule and on the thickness of the nanoparticle films at room temperature is investigated. We describe theoretically conductance between adjacent metal nanoparticles in terms of single electron tunneling along the linker molecules. Due to variations in the separation gaps between neighboring nanoparticles a film can be approximated by a network of widely varying tunnel conductances and the film conductivity can be described in terms of percolation theory. We demonstrate that the expected exponential decrease of the conductivity with increasing length of linker molecules is weakened by the presence of high conductance percolation pathways and we show that due to three-dimensional current percolation the conductivity of the nanoparticle films becomes film thickness dependent.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional percolation effect on electrical conductivity in films of metal nanoparticles linked by organic molecules

et al. 2003

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“…For the disordered arrays the threshold also decreases linearly at low T. Decreases in the threshold with increasing temperature have also been observed in previous experiments on disordered arrays. 12,13,[15][16][17] In both the ordered and disordered arrays, for higher temperatures the threshold is lost and the nonlinear scaling of the I-V curve disappears and is replaced by linear behavior. Other experiments on ordered arrays have also found that temperature only weakly affects the shape of the I-V curves.…”

Section: Introductionmentioning

confidence: 99%

“…6,9 Previous simulations have been limited to Tϭ0, 1,4 or have considered only very small arrays. 17,18 Another type of perturbation that has recently been considered in experiments on highly resistive samples is the application of a sudden dc drive. 19 The application of a dc voltage that is below the conduction threshold voltage produces a current response that shows a two stage decay.…”

Section: Introductionmentioning

confidence: 99%

Temperature and ac effects on charge transport in arrays of metallic dots

Reichhardt

2003

Phys. Rev. B

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We investigate the effects of finite temperature, dc pulse, and ac drives on the charge transport in metallic arrays using numerical simulations. For finite temperatures there is a finite conduction threshold which decreases linearly with temperature. Additionally we find a quadratic scaling of the current-voltage curves which is independent of temperature for finite thresholds. These results are in excellent agreement with recent experiments on 2D metallic dot arrays. We have also investigated the effects of an ac drive as well as a suddenly applied dc drive. With an ac drive the conduction threshold decreases for fixed frequency and increasing amplitude and saturates for fixed amplitude and increasing frequency. For sudden applied dc drives below threshold we observe a long time power-law conduction decay.

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“…However, the arrays are not ordered in general. Junction parameters, including tunnel resistance R T and capacitance C, were largely dispersed [12]. On the other hand, a one-dimensional (1D) array of tunnel junctions will only work when every junction is functioning properly.…”

Section: Introductionmentioning

confidence: 99%

Disordered junction arrays used for Coulomb blockade thermometry

Chow

2003

Eur. Phys. J. Appl. Phys.

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Abstract.A possible application of nanometer-sized junction arrays is to Coulomb blockade thermometry (CBT), although only highly disordered arrays can be fabricated at present. In this paper, the characteristics of CBT device with disordered arrays will be studied. Similar to what is observed for uniform arrays, there is a dip at zero bias voltage in the differential conductance of disordered arrays. However, the half-width V 1/2 of the dip for one-dimensional disordered arrays is largely dispersed. This study suggests that better devices can be developed by connecting a number of one-dimensional arrays in parallel to form an array group. The dispersion of half-width is quite small with values of V 1/2 close to a constant. Further, the effects of electromagnetic environment and low temperature on the half-width are investigated. Results are agreed with those observed experimentally, that for the effect of the environment is negligible for large arrays. The half-width of a disordered array may be bigger or smaller than the ideal value, depending on the extend of disorder.

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Temperature behavior of multiple tunnel junction devices based on disordered dot arrays

Cited by 49 publications

References 18 publications

Three-dimensional percolation effect on electrical conductivity in films of metal nanoparticles linked by organic molecules

Three-dimensional percolation effect on electrical conductivity in films of metal nanoparticles linked by organic molecules

Temperature and ac effects on charge transport in arrays of metallic dots

Disordered junction arrays used for Coulomb blockade thermometry

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