Non-born-oppenheimer density functional theory for excited states by using green's function techniques

2001 ◽  
Vol 84 (3) ◽  
pp. 354-362 ◽  
Author(s):  
T. Yoshimoto ◽  
Y. Ohta ◽  
J. Maki ◽  
Y. Shigeta ◽  
H. Nagao ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Green’S Function ◽  
Excited States ◽  
Green's Function ◽  
Density Functional ◽  
Functional Theory

scholarly journals Excited states properties of organic molecules: from density functional theory to the GW and Bethe–Salpeter Green's function formalisms

2014 ◽  
Vol 372 (2011) ◽  
pp. 20130271 ◽  
Author(s):  
C. Faber ◽  
P. Boulanger ◽  
C. Attaccalite ◽  
I. Duchemin ◽  
X. Blase
Keyword(s):  
Density Functional Theory ◽  
Green’S Function ◽  
Excited States ◽  
Green's Function ◽  
Potential Energy Surfaces ◽  
Density Functional ◽  
Many Body ◽  
Excitation Energies ◽  
Functional Theory ◽  
Organic Systems

Many-body Green's function perturbation theories, such as the GW and Bethe–Salpeter formalisms, are starting to be routinely applied to study charged and neutral electronic excitations in molecular organic systems relevant to applications in photovoltaics, photochemistry or biology. In parallel, density functional theory and its time-dependent extensions significantly progressed along the line of range-separated hybrid functionals within the generalized Kohn–Sham formalism designed to provide correct excitation energies. We give an overview and compare these approaches with examples drawn from the study of gas phase organic systems such as fullerenes, porphyrins, bacteriochlorophylls or nucleobases molecules. The perspectives and challenges that many-body perturbation theory is facing, such as the role of self-consistency, the calculation of forces and potential energy surfaces in the excited states, or the development of embedding techniques specific to the GW and Bethe–Salpeter equation formalisms, are outlined.

High tunneling magnetoresistance induced by symmetry and quantum interference in magnetic molecular junctions

2021 ◽  
Author(s):  
Lin Huang ◽  
Yu-Jia Zeng ◽  
Dan Wu ◽  
Nan-Nan Luo ◽  
Ye-Xin Feng ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Green’S Function ◽  
Green's Function ◽  
Quantum Interference ◽  
Density Functional ◽  
Molecular Junctions ◽  
Tunneling Magnetoresistance ◽  
Functional Theory ◽  
Nonequilibrium Green's Function ◽  
Molecular Scale

Achieving high tunneling magnetoresistance (TMR) in molecular-scale junctions is attractive for their applications in spintronics. By using density-functional theory (DFT) in combination with the nonequilibrium Green's function (NEGF) method, we...

Controlling the electronic transport properties of the tetrapyrimidinyl molecule with atom modified sulfur bridge

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10675-10679 ◽  
Author(s):  
Jie Ma ◽  
Chuan-Lu Yang ◽  
Mei-Shan Wang ◽  
Xiao-Guang Ma
Keyword(s):  
Density Functional Theory ◽  
Green’S Function ◽  
Transport Properties ◽  
Green's Function ◽  
Electronic Transport ◽  
Density Functional ◽  
Functional Theory ◽  
Electronic Transport Properties ◽  
Nonequilibrium Green's Function ◽  
Probe System

The effect of the modified sulfur bridge on the I–V characteristics of a two-probe system of tetrapyrimidinyl molecules and Au electrodes is explored based on density functional theory with nonequilibrium Green's function.

Electronic and transport properties of PSi@MoS2 nanocables

2016 ◽  
Vol 18 (6) ◽  
pp. 4333-4344
Author(s):  
Cuicui Sun ◽  
Guiling Zhang ◽  
Yan Shang ◽  
Zhao-Di Yang ◽  
Xiaojun Sun
Keyword(s):  
Density Functional Theory ◽  
Green’S Function ◽  
Transport Properties ◽  
Green's Function ◽  
Electronic Structures ◽  
Density Functional ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

Electronic structures and transport properties of prototype MoS2 nanotube (15, 0) nanocables, including undoped PSi@MoS2 and B- and P-doped PSi@MoS2 (where PSi refers to polysilane), are investigated using the density functional theory (DFT) and the non-equilibrium Green's function (NEGF) methods.

Sign in / Sign up

Export Citation Format

Share Document