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Home > Mathematics and Science Textbooks > Physics > Quantum Transport Through a C48n12 Based Nanodevice
Quantum Transport Through a C48n12 Based Nanodevice

Quantum Transport Through a C48n12 Based Nanodevice


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About the Book

This dissertation, "Quantum Transport Through a C48N12 Based Nanodevice" by Yan, Xu, 徐艷, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled QUANTUM TRANSPORT THROUGH A C N BASED NANODEVICE 48 12 submitted by Xu Yan for the Degree of Master of Philosophy at The University of Hong Kong in December 2004 The aim of this thesis study is to investigate quantum transport through a C N based nanodevice. This novel C N doped-fullerene molecule has at- 48 12 48 12 tracted great attention due to their remarkable structural and electronic prop- erties. The transport properties of the Al-C N -Al system under external bias 48 12 and gate potentials have been investigated using an ab initio method developed by a research group in McGill University led by Prof. H. Guo. Their method is based on density functional theory combining nonequilibrium Green's func- tion. A good understanding of the general transport features observed in the nanoscale devices has been obtained from the electronic structure of the system. Detail analysis of the transport properties of the C N molecular systems 48 12has been performed. These properties are mainly influenced by the interac- tions between the molecules and electrodes. Calculations show that conduc- tance is sensitive to charge transfer between the molecule and the electrode at equilibrium. This charge transfer can align the lowest unoccupied molecular or- bital(LUMO) of the C N molecule to the Fermi level of the Al electrodes, so it 48 12 can inhibit the conductance of the molecular system, which has been explained through investigations of the C N molecular systems for three different ori- 48 12 entations of the molecule. Based on the Landauer formalism, the current-voltage characteristics of the nanoscale systems have been calculated. The IV characteristics have been ex- plained from a simple picture of shifting the mediating channels under the ex- ternal bias voltage. The transport properties of this molecular system were further investigated by calculation under gate potential coupled to the molecule. As a result, this external potential can switch the device from an insulating state to a metallic state which shows that this nanoscale device can be produced as a field-effect molecular current switch in future. DOI: 10.5353/th_b3147118 Subjects: Electron transport Nanotechnology


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Product Details
  • ISBN-13: 9781361206164
  • Publisher: Open Dissertation Press
  • Publisher Imprint: Open Dissertation Press
  • Height: 279 mm
  • No of Pages: 78
  • Weight: 476 gr
  • ISBN-10: 1361206160
  • Publisher Date: 26 Jan 2017
  • Binding: Hardback
  • Language: English
  • Spine Width: 6 mm
  • Width: 216 mm

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