Synthetic theory of Poole and Poole-Frenkel (PF) effects

Ongaro, R.; Pillonnet, Alain

doi:10.1049/ip-a-3.1991.0018

Cited by 18 publications

(19 citation statements)

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“…. A typical measure of the transition field F t between the Poole and Poole-Frenkel regimes is [22] F es…”

Section: Modelingmentioning

confidence: 99%

“…The resulting derivation gives a simple analytical description in which the transition from Poole to Poole-Frenkel conduction can be tuned by adjusting the parameter δ, however at the cost of a rather unclear physical picture. Yet another model by Pillonnet et al showed that the Poole to Poole-Frenkel transition could also be deduced from Hill's approach [13] by considering a carrier in a pair of Coulombic wells separated by a distance s [22]. Hill's model, however, assumes, just like Ielmini and Zhang, immediate re-trapping after emission which leads to a constant travel distance of the charge carriers.…”

Section: Introductionmentioning

confidence: 99%

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Subthreshold electrical transport in amorphous phase-change materials

et al. 2015

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Chalcogenide-based phase-change materials play a prominent role in information technology. In spite of decades of research, the details of electrical transport in these materials are still debated. In this article, we present a unified model based on multiple-trapping transport together with 3D Poole-Frenkel emission from a two-center Coulomb potential. With this model, we are able to explain electrical transport both in as-deposited phase-change material thin films, similar to experimental conditions in early work dating back to the 1970s, and in melt-quenched phase-change materials in nanometer-scale phase-change memory devices typically used in recent studies. Experimental measurements on two widely different device platforms show remarkable agreement with the proposed mechanism over a wide range of temperatures and electric fields. In addition, the proposed model is able to seamlessly capture the temporal evolution of the transport properties of the meltquenched phase upon structural relaxation.

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“…. A typical measure of the transition field F t between the Poole and Poole-Frenkel regimes is [22] F es…”

Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Subthreshold electrical transport in amorphous phase-change materials

et al. 2015

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“…(4) and (5) in the limit of large and small concentration of traps, respectively, we computed the thermal-emission time by the physical model presented in [16]. In this numerical model, the thermal emission time is calculated by: where is the potential barrier, obtained from the calculated potential profile between two positively-charged sites, neglecting screening effects [22]. Fig.…”

Section: Physical Interpretationmentioning

confidence: 99%

Physical mechanism and temperature acceleration of relaxation effects in phase-change memory cells

Ielmini

Sharma

Lavizzari

et al. 2008

2008 IEEE International Reliability Physics Symposium

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The main reliability issues of phase change memory (PCM) cells are related to the metastable nature of the amorphous phase in the chalcogenide material. The amorphous phase spontaneously evolves during time by crystallization and structural relaxation, that is the short range ordering in the amorphous phase to minimize the defect concentration and free energy. Crystallization physics has been studied by almost years, and application of the standard nucleation theory has been successfully applied to provide extrapolation methodologies for PCM reliability estimation. On the other hand, structural relaxation and its impact on carrier transport in the amorphous chalcogenide are not completely understood yet. The purpose of this paper is to study structural relaxation effects in PCM cells, focusing on a) the physical interpretation of the relaxation and b) the temperature acceleration of the phenomenon, which is essential to provide extrapolation techniques and analytical compact models for prediction of PCM reliability.

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“…The intrinsic conductivity of CMX does not vary with temperature, whereas the electric conductivity of the CMX/DC93500 sample decreases by decades from 20 C to 60 C. The evolution of electric conductivity with relaxation time is linked to the electric field decrease; the application of a high electric field across the sample (due to the potential buildup under electron irradiation) distorts the conduction band and traps energy wells, which lowers the activation energy required for an electron to hop to the conduction band and furthers the electron thermal detrapping. This electric field effect on charge transport is known as the Poole-Frenkel effect [10,17].…”

Section: B Batchmentioning

confidence: 99%

Charging Behavior of Space-Used Adhesives at Low Temperature in Geostationary Orbit

Paulmier

Dirassen

Payan

2012

Journal of Spacecraft and Rockets

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This paper presents experimental results carried out on coverglasses and silicone adhesive/coverglasses systems for the analysis of their charging behavior at low temperatures. These samples have been tested under monoenergetic and geostationary-like spectrum electron flux at different operating temperatures, ranging from 20 C down to 90 C. It has been demonstrated that adhesive strongly steers the charging potential of these systems due to the high decrease of their electric conductivity with the applied temperature. Radiation-induced conductivity, initiated by the high energy electron flux, tends to noticeably decrease with temperature for the adhesive, as opposed to coverglasses, which do not present any strong variation of their radiation-induced conductivity with the temperature. This study demonstrates that using silicone adhesive on components liable to get cooled down in geostationary orbit presents a significant risk of high charging potentials and consequent electrical discharges.

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Synthetic theory of Poole and Poole-Frenkel (PF) effects

Cited by 18 publications

References 0 publications

Subthreshold electrical transport in amorphous phase-change materials

Subthreshold electrical transport in amorphous phase-change materials

Physical mechanism and temperature acceleration of relaxation effects in phase-change memory cells

Charging Behavior of Space-Used Adhesives at Low Temperature in Geostationary Orbit

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