Seebeck Coefficient Calculated by Kubo–Greenwood Formula on the Basis of Density Functional Theory

2009 ◽  
Vol 78 (2) ◽  
pp. 024708 ◽  
Author(s):  
Masahiro Oshita ◽  
Satoshi Yotsuhashi ◽  
Hideaki Adachi ◽  
Hisazumi Akai
Keyword(s):  
Density Functional Theory ◽  
Seebeck Coefficient ◽  
Density Functional ◽  
Functional Theory

scholarly journals Giant magnetoresistance and spin Seebeck coefficient in zigzag α-graphyne nanoribbons

Nanoscale ◽  
2014 ◽  
Vol 6 (19) ◽  
pp. 11121-11129 ◽  
Author(s):  
Ming-Xing Zhai ◽  
Xue-Feng Wang ◽  
P. Vasilopoulos ◽  
Yu-Shen Liu ◽  
Yao-Jun Dong ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Green's Function ◽  
Density Functional ◽  
Function Method ◽  
Giant Magnetoresistance ◽  
Functional Theory ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

We investigate the spin-dependent electric and thermoelectric properties of ferromagnetic zigzag α-graphyne nanoribbons (ZαGNRs) using density-functional theory combined with non-equilibrium Green's function method.

Thermoelectric Properties of Sm Doped CaMnO3 Using Density Functional Theory Method

2020 ◽  
Vol 1010 ◽  
pp. 334-338
Author(s):  
Abdullah Chik ◽  
Ruhiyuddin Mohd Zaki ◽  
Akeem Adekunle Adewale ◽  
Faizul Che Pa ◽  
Yeoh Cheow Keat
Keyword(s):  
Thermal Conductivity ◽  
Density Functional Theory ◽  
High Temperature ◽  
Seebeck Coefficient ◽  
Temperature Dependence ◽  
Band Gap ◽  
Thermoelectric Properties ◽  
Density Functional ◽  
Electronic Band ◽  
Functional Theory

The electronic structure and thermoelectric properties of CaMnO3 doped with 8% and 17% f block element Sm using first principles calculations and semi-classic Boltzmann theory were presented in this paper. The G-type AFM phase is most stable among five phases for CaMnO3, however, with 8% and 17% Sm doping, these compounds became nonmagnetic phases. CaMnO3 calculated electronic band structure shows an indirect band gap of 0.523 eV, which is underestimated by the density functional theory (DFT) calculations but the band gap explains the semiconducting behavior. However, with 8% and 17% Sm doping, the electronic bandstructure of these compounds exhibit metallic behavior, with Sm and Mn 3d electrons contributing to conduction band, increasing the magnitude of conductivity for doped compounds. All temperature dependence Seebeck coefficient plots show n-typed conduction for all compound with reduced magnitude of Seebeck coefficient for doped compounds. The temperature dependence thermal conductivity plot shows overall thermal conductivity is reduced in Sm doped compound. CaMnO3 with 17% Sm doping exhibit much higher ZT of 0.32 at 800 K showing enhanced thermoelectric properties at high temperature and suitability or high temperature energy conversion devices.

scholarly journals Density functional theory of the Seebeck coefficient in the Coulomb blockade regime

2016 ◽  
Vol 94 (8) ◽  
Author(s):  
Kaike Yang ◽  
Enrico Perfetto ◽  
Stefan Kurth ◽  
Gianluca Stefanucci ◽  
Roberto D'Agosta
Keyword(s):  
Density Functional Theory ◽  
Seebeck Coefficient ◽  
Coulomb Blockade ◽  
Density Functional ◽  
Functional Theory ◽  
Coulomb Blockade Regime

Doping effects on the geometric and electronic structure of tin clusters

2019 ◽  
Vol 21 (44) ◽  
pp. 24478-24488 ◽  
Author(s):  
Martin Gleditzsch ◽  
Marc Jäger ◽  
Lukáš F. Pašteka ◽  
Armin Shayeghi ◽  
Rolf Schäfer
Keyword(s):  
Density Functional Theory ◽  
Electronic Structure ◽  
Density Functional ◽  
Beam Deflection ◽  
Functional Theory ◽  
Doping Effects ◽  
Depth Analysis ◽  
Trajectory Simulations

In depth analysis of doping effects on the geometric and electronic structure of tin clusters via electric beam deflection, numerical trajectory simulations and density functional theory.

What correlation effects are covered by density functional theory?

2000 ◽  
Vol 98 (20) ◽  
pp. 1639-1658 ◽  
Author(s):  
Yuan He, Jurgen Grafenstein, Elfi Kraka,
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Correlation Effects ◽  
Functional Theory
Sign in / Sign up

Export Citation Format

Share Document