Single-Electron Effects in Arrays of Normal Tunnel Junctions

Geigenmüller, U.; Schön, Gerd

doi:10.1209/0295-5075/10/8/011

Cited by 81 publications

(52 citation statements)

References 9 publications

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“…The inter-particle charge transport is a stochastic process in which tunneling of an electron between nodes i → j at time t is governed by the probability distribution p ij (t) = Γ ij exp(−Γ ij t), with the tunneling rate [11,10] …”

Section: Tunneling Implementationmentioning

confidence: 99%

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Simulation of the Electron Tunneling Paths in Networks of Nano-particle Films

Šuvakov

Tadić

2007

Computational Science – ICCS 2007

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Abstract. Thin films of nano-particles deposited on substrates are important for new technological applications. Their physical properties depend crucially on particle size and structural inhomogeneity of the deposition. To systematically investigate these dependencies, we apply graph theory and simulations of voltage-driven tunneling conduction. We implement a network model of nano-particle films, based on data of particle positions on a two-dimensional plane. Assuming that connected particles on the network are within the tunneling distance, we then implement a continuous-time electron tunneling on the network and show how the current-voltage characteristics depend on the graph structure. We visualize the conduction paths through the network which correspond to the measured currents both in random and spatially inhomogeneous films.

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Section: Tunneling Implementationmentioning

confidence: 99%

“…It has been recognized that the physical properties of these nano-particle arrays and thin films depend on the mutual positions of the nano-particles and global characteristics of the structure [9]. In particular, enhanced non-linear conduction properties have been observed in certain structures of nano-particles [10,11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Electron Tunneling Paths in Networks of Nano-particle Films

Šuvakov

Tadić

2007

Computational Science – ICCS 2007

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“…The latter naturally occur because of the resonant Andreev processes occurring in the TP sequence, and lead to a system of Bloch-like equations [37]. The derivation is inspired by the work of Gurvitz [38,39] who treated the cases of single and double-dot systems. The generalization starts from an effective Hamiltonian, which is the sum of the Andreev pair Hamiltonian and the one-electron injection/detection terms as in Eq.…”

Section: Calculation Of the Teleportation Currentmentioning

confidence: 99%

Electron spin teleportation current through a quantum dot array operating in the stationary regime

2004

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An electron spin state teleportation scheme is described in detail. It is based on the protocol by Bennett et al. [Phys. Rev. Lett. 70, 1895], and involves the production and detection by superconductors of entangled pairs of electrons. Quantum dots filter individual electron transitions, and the whole teleportation sequence is selected in a five-dot cell by electrostatic gating in the stationary regime (no time dependent gate voltages): i) a normal dot carry the electron spin state to be teleported, two others carry the ancillary entangled pair; ii) two superconducting dots, coupled by a superconducting circuit, control the injection of the source electron and the detection of the teleported electron. This teleportation cell is coupled to emitter and receiver reservoirs. In a steady state, a spin-conserving current flows between the reservoirs, most exclusively carried by the teleportation channel. This current is perfectly correlated to a Cooper pair current flowing in the superconducting circuit, and which triggers detection of the teleported electron. This latter current indeed carries the classical information, which is necessary to achieve teleportation. The average teleportation current is calculated using the Bloch equations, for weakly coupled spin reservoirs. A diagnosis of teleportation is proposed using noise correlations.

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“…Especially the geometry of the array plays a major role since it is intended to design the electron transport properties by controlling the shape of the device. From existing studies of arrays of metallic nanoparticles with small capacitances and high junction resistances 10,11,12,13,14,15,16 it is known that such systems exhibit nonlinear current-voltage characteristics -also called IV characteristics -which can be used for inter- Wireframe of a typical considered geometry. Adopting the capacitance model we assume that gate, leads and nanoparticles are ideal conductors while the other parts of the system are modelled as dielectrics.…”

mentioning

confidence: 99%

Designable electron transport features in one-dimensional arrays of metallic nanoparticles: Monte Carlo study of the relation between shape and transport

2005

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We study the current and shot noise in a linear array of metallic nanoparticles taking explicitly into consideration their discrete electronic spectra. Phonon assisted tunneling and dissipative effects on single nanoparticles are incorporated as well. The capacitance matrix which determines the classical Coulomb interaction within the capacitance model is calculated numerically from a realistic geometry. A Monte Carlo algorithm which self-adapts to the size of the system allows us to simulate the single-electron transport properties within a semiclassical framework. We present several effects that are related to the geometry and the one-electron level spacing like e.g. a negative differential conductance (NDC) effect. Consequently these effects are designable by the choice of the size and arrangement of the nanoparticles.

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Single-Electron Effects in Arrays of Normal Tunnel Junctions

Cited by 81 publications

References 9 publications

Simulation of the Electron Tunneling Paths in Networks of Nano-particle Films

Simulation of the Electron Tunneling Paths in Networks of Nano-particle Films

Electron spin teleportation current through a quantum dot array operating in the stationary regime

Designable electron transport features in one-dimensional arrays of metallic nanoparticles: Monte Carlo study of the relation between shape and transport

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