WebMar 29, 2013 · This review deals with the nonequilibrium Green's function (NEGF) method applied to the problems of energy transport due to atomic vibrations (phonons), primarily for small junction systems. We present a pedagogical introduction to the subject, deriving some of the well-known results such as the Laudauer-like formula for heat current in ballistic … WebMay 16, 2024 · In the present study, we have calculated phonon thermal-conductance of a one-dimensional (1D) semiconductor nanostructure by self-consistently solving coupled NEGF equations for electrons and phonons. We especially focus on the phonons thermal-conductance changes due to the electron–phonon interaction and the impact of the …
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WebThis section describes the most important aspects of the formalism in QuantumATK for simulating device systems using the non-equilibrium Green’s function (NEGF) method. For a more detailed description of the theory you may consult some of the many research papers on the subject [BMOrdejon+02], [STBG05], [HJ08], [Dat97]. WebNEGF Background • Initially developed to simulate electron ballistic transport • Very efficient in the ballistic regime but ... Represents the response of the bulk contacts to incident phonon waves; its imaginary part is proportional to the density of states in the contacts. Self Energy Matrices Represent the changes green pan ceramic reviews
Phys. Rev. B 106, 085403 (2024) - Atomistic simulation of …
WebApr 27, 2024 · It has been shown that the phonon nonequilibrium Green's function method (NEGF) is effective for the investigation of nanoscale quantum transport of phonons. Here, two aspects of thermal engineering of quantum devices are discussed using NEGF methods. One covers transport properties of pure phonons; the other concerns caloritronic effects ... WebJul 26, 2012 · Firstly, NEGF is used to derive phonon-phonon Hedin-like functional derivative equations which generates conserving self energy approximations for phonon-phonon interaction. Secondly, for the Landauer-like theory, using the perturbation expansion, we easily obtain anharmonic (or phonon-phonon interaction) corrections to the ballistic … WebMay 4, 2024 · The NEGF formalism also provides a suitable framework for coupled electron-phonon transport [30,31,32,33,34,35,36,37], which is an essential feature of the quantum hybrid systems. The NEGF method, however, requires substantial computational resources and the efficiency of numerical algorithm is of utmost importance for simulating realistic ... greenpan ceramic thermolon hard anodized