نتایج جستجو برای: negf

تعداد نتایج: 250  

2018
Guohuan Xiong Yuheng Xing Lifa Zhang

In modern information technology, as integration density increases rapidly and the dimension of materials reduces to nanoscale, interfacial thermal transport (ITT) has attracted widespread attention of scientists. This review introduces the latest theoretical development in ITT through one-dimensional (1D) atomic junction model to address the thermal transport across an interface. With full con...

Journal: :Advanced quantum technologies 2023

The performance of dual-gate GaAs-nanowire field-effect-transistor (FET) is investigated as a charge-qubit device operating at room temperature. In compatibility with the state-of-the-art classical bit technology, it shown that single gate nanowire FET can be replaced by two localized gates to achieve such operation. On application relevant biases gates, voltage tunable quantum dots are created...

Journal: :Physical review 2021

The electronic properties of antimonene, single-layer Sb, are attracting great attention. In this paper, spin transport in armchair antimonene nanoribbon (ASbNR) is investigated. Following the tight-binding model, we calculate both transmission probability and conductance by means non-equilibrium Green's function (NEGF) method. effects an external electric field vertical to ribbon plane explore...

In this paper, the performance of a CNT-JLTFET under different values of torsional strains of 0, 3, and 5 degrees has been investigated. Simulation has been carried out using non-equilibrium Green’s function (NEGF) formalism in the mode-space approach and in the ballistic limit. The simulation results indicate that, under torsional strain, an increase occurs in the energy band-gap, and thus the...

Journal: :EPL 2023

Abstract We show quantum systems with disordered Hamiltonians may exhibit order in commonly measured quantities. This counter-intuitive situation is demonstrated using a conventional tight binding model for two-dimensional nanoribbons various boundary conditions. The analysis uses the traditional non-equilibrium Green's function (NEGF) methodology electron transport. study dragon nanodevices th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی شاهرود - دانشکده فیزیک 1394

در این پژوهش از بین نیمرساناهای گروه iii–v، گالیوم نیترید بدلیل داشتن دمای کوری بالای دمای اتاق و گاف نواری بزرگ به عنوان ماده مورد بررسی انتخاب گردید. سعی ما در این پژوهش یافتن ساختارهایی با ویژگی مناسب برای استفاده در مطالعات ترابردی بوده است. در قسمت اول خواص الکترونی، مغناطیسی نانو روبان خالص، دارای نقص و آلایش یافته gan با عناصر واسطه(cr, mn , fe, ni ) ، با استفاده از رهیافت نظریه تابعی چگ...

Journal: :iranian journal of electrical and electronic engineering 0
m. akbari eshkalak roudsar

abstract: this paper is the first study on the impact of ambient temperature on the electrical characteristics and high frequency performances of double gate armchair graphene nanoribbon field effect transistor (gnrfet). the results illustrate that the gnrfet under high temperature (ht-gnrfet) has the highest cut-off frequency, lowest sub-threshold swing, lowest intrinsic delay and power delay ...

Jaber Jahanbin Sardroodi Sadegh Afshari,

Electron transport properties of pure and Oxygen and/or Methyl substituted pyrene between two semi-infinite Aluminum atomic electrodes have been investigated by means of density functional theory plus the non-equilibrium green’s function method. The electrodes were represented by a slab of Al atoms oriented along the [111] plane. The computations were carried out in the bias voltage range of 0....

Journal: Journal of Nanoanalysis 2017
Hakimeh Mohammadpour Jaber Jahanbin Sardroodi, Sadegh Afshari,

Quantum transport properties of pure and functioned infinite lead-connection region-lead systembased on the zigzag graphene nanoribbon (2-zGNR) have been investigated. In this work the effectof the doping functionalization on the quantum transport of the 2-zGNR has been computationallystudied. Also, the effect of the imposed gate voltages (-3.0, 0.0 and +3.0 V) and bias voltages 0.0 to2.0 V hav...

Journal: :journal of nanostructures 0
debarati dey 1 department of computer science & engineering, west bengal university of technology. bf-142, sector 1, salt lake city. kolkata –700 064. west bengal, india. pradipta roy dept. of computer sc. & engg, swami vivekananda institute of science & technology. dakshin gobindapur. p.s.: sonarpur. kolkata –700 145. west bengal, india debashis de dept. of computer science & engg, maulana abul kalam azad university of technology. bf-142, sector 1, salt lake city. kolkata –700 064. west bengal, india

this paper presents density functional theory and non-equilibrium green’s function based first principles calculations to explore the sensing property of adenine and thymine based hetero-junction chins for ammonia and phosphine gas molecules. this modeling and simulation technique plays an important and crucial role in the fast growing semiconductor based nanotechnology field. the hetero-juncti...

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