Schemes for Single Electron Transistor Based on Double Quantum Dot Islands Utilizing a Graphene Nanoscroll, Carbon Nanotube and Fullerene

The single electron transistor (SET) is a nanoscale switching device with a simple equivalent circuit. It can work very fast as it is based on the tunneling of single electrons. Its nanostructure contains a quantum dot island whose material impacts on the device operation. Carbon allotropes such as fullerene (C60), carbon nanotubes (CNTs) and graphene nanoscrolls (GNSs) can be utilized as the quantum dot island in SETs. In this study, multiple quantum dot islands such as GNS-CNT and GNS-C60 are utilized in SET devices. The currents of two counterpart devices are modeled and analyzed. The impacts of important parameters such as temperature and applied gate voltage on the current of two SETs are investigated using proposed mathematical models. Moreover, the impacts of CNT length, fullerene diameter, GNS length, and GNS spiral length and number of turns on the SET’s current are explored. Additionally, the Coulomb blockade ranges (CB) of the two SETs are compared. The results reveal that the GNS-CNT SET has a lower Coulomb blockade range and a higher current than the GNS-C60 SET. Their charge stability diagrams indicate that the GNS-CNT SET has smaller Coulomb diamond areas, zero-current regions, and zero-conductance regions than the GNS-C60 SET.

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CHARGE STABILITY AND CONDUCTANCE ANALYSIS OF ANTHRACENE-BASED SINGLE ELECTRON TRANSISTOR

International Journal of Nanoscience ◽

10.1142/s0219581x13500452 ◽

2013 ◽

Vol 12 (06) ◽

pp. 1350045 ◽

Cited By ~ 14

Author(s):

ANURAG SRIVASTAVA ◽

BODDEPALLI SANTHIBHUSHAN ◽

PANKAJ DOBWAL

Keyword(s):

Coulomb Blockade ◽

Density Functional ◽

Stability Diagram ◽

Single Electron ◽

Single Electron Transistor ◽

Functional Theory ◽

Charge Stability ◽

Anthracene Molecule ◽

The Stability ◽

Experimental Values

The present paper discusses the investigation of electronic properties of anthracene-based single electron transistor (SET) operating in coulomb blockade region using Density Functional Theory (DFT) based Atomistix toolkit-Virtual nanolab. The charging energies of anthracene molecule in isolated as well as electrostatic SET environments have been calculated for analyzing the stability of the molecule for different charge states. Study also includes the analysis of SET conductance dependence on source/drain and gate potentials in reference to the charge stability diagram. Our computed charging energies for anthracene in isolated environment are in good agreement with the experimental values and the proposed anthracene SET shows good switching properties in comparison to other acene series SETs.

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Design and Simulation of Two Bits Single-electron Logic Circuit using Double Quantum Dot Single Electron Transistor

International Journal of Technology ◽

10.14716/ijtech.v5i2.405 ◽

2014 ◽

Vol 5 (2) ◽

pp. 152

Author(s):

Arief Udhiarto ◽

Mohammad Ali Tamam ◽

Ratno Nuryadi ◽

Djoko Hartanto

Keyword(s):

Quantum Dot ◽

Logic Circuit ◽

Single Electron ◽

Double Quantum ◽

Single Electron Transistor ◽

Double Quantum Dot

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Isolated double quantum dot capacitively coupled to a single quantum dot single-electron transistor in silicon

Applied Physics Letters ◽

10.1063/1.1626017 ◽

2003 ◽

Vol 83 (19) ◽

pp. 3942-3944 ◽

Cited By ~ 27

Author(s):

Emir G. Emiroglu ◽

David G. Hasko ◽

David A. Williams

Keyword(s):

Quantum Dot ◽

Single Electron ◽

Double Quantum ◽

Single Electron Transistor ◽

Single Quantum ◽

Capacitively Coupled ◽

Double Quantum Dot ◽

Single Quantum Dot

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Non-equilibrium charge stability diagrams of a silicon double quantum dot

Applied Physics Letters ◽

10.1063/1.3640236 ◽

2011 ◽

Vol 99 (11) ◽

pp. 112116 ◽

Cited By ~ 7

Author(s):

M. G. House ◽

H. Pan ◽

M. Xiao ◽

H. W. Jiang

Keyword(s):

Quantum Dot ◽

Double Quantum ◽

Stability Diagrams ◽

Equilibrium Charge ◽

Double Quantum Dot ◽

Charge Stability ◽

Non Equilibrium

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Detecting Air Pollutant Molecules Using Tube-Shaped Single Electron Transistor

Molecules ◽

10.3390/molecules26237098 ◽

2021 ◽

Vol 26 (23) ◽

pp. 7098

Author(s):

Zhongkai Huang ◽

Xiangyang Peng ◽

Cheng Peng ◽

Jin Huang ◽

Maolin Bo ◽

...

Keyword(s):

Single Molecule ◽

Room Temperature ◽

Air Pollutant ◽

Single Electron ◽

Single Electron Transistor ◽

First Principles Calculations ◽

Single Molecule Level ◽

Stability Diagrams ◽

Charge Stability ◽

Axis Of Symmetry

An air pollution detector is proposed based on a tube-shaped single-electron transistor (SET) sensor. By monitoring the flow control component of the detector, each air pollutant molecule can be placed at the center of a SET nanopore and is treated as an island of the SET device in the same framework. Electron transport in the SET was incoherent, and the performances of the SET were sensitive at the single molecule level. Employing first-principles calculations, electronic features of an air pollutant molecule within a tube-shaped SET environment were found to be independent of the molecule rotational orientations with respect to axis of symmetry, unlike the electronic features in a conventional SET environment. Charge stability diagrams of the island molecules were demonstrated to be distinct for each molecule, and thus they can serve as electronic fingerprints for detection. Using the same setup, quantification of the air pollutant can be realized at room temperature as well. The results presented herein may help provide guidance for the identification and quantification of various types of air pollutants at the molecular level by treating the molecule as the island of the SET component in the proposed detector.

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GRAPHYNE-BASED SINGLE ELECTRON TRANSISTOR: AB INITIO ANALYSIS

NANO ◽

10.1142/s1793292014500325 ◽

2014 ◽

Vol 09 (03) ◽

pp. 1450032 ◽

Cited By ~ 11

Author(s):

J. V. N. SARMA ◽

RAJIB CHOWDHURY ◽

R. JAYAGANTHAN

Keyword(s):

Coulomb Blockade ◽

Density Functional ◽

Stability Diagram ◽

Single Electron ◽

Present System ◽

Single Electron Transistor ◽

Poisson Equations ◽

Charge Stability ◽

Coulomb Blockade Regime ◽

Charging Energy

The application of graphyne for a single-electron transistor (SET) that is operating in the Coulomb blockade regime is investigated in the first principles framework. Density functional theory modeling for graphyne has been used and the device environment has been described by a continuum model. The interaction between graphyne and the SET environment is treated with self-consistent Poisson equations. The charging energy as a function of gate voltage thus calculated has been used to obtain the charge stability diagram for the present system. The effect of electrode separation and the position of the molecule with respect to the dielectric on the gate coupling have been studied further. As compared with the previously studied systems on this line, graphyne has been observed to provide the gate coupling that is nearly close to that of benzene and graphene, but significantly greater than fullerene-based systems.

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