JVASP-26047_Co21(ReB3)2

Quick Links: Convergence
Structure
Thermoelectric
Magnetic
See also

JARVIS-ID:JVASP-26047	Functional:optB88-vdW	Primitive cell	Primitive cell	Conventional cell	Conventional cell
Chemical formula:Co21(ReB3)2	Formation energy/atom (eV):-0.183	a 7.381 Å	α:60.0 °	a 10.438 Å	α:90.0 °
Space-group :Fm-3m, 225	Relaxed energy/atom (eV):-5.2198	b 7.381 Å	β:60.0 °	b 10.438 Å	β:90.0 °
Calculation type:Bulk	SCF bandgap (eV):0.001	c 7.381 Å	γ:60.0 °	c 10.438 Å	γ:90.0 °
Crystal system:cubic	Point group:m-3m	Density (gcm^-3):9.78	Volume (Å³):284.34	nAtoms_prim:29	nAtoms_conv:116

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Convergence [Reference]

Calculations are done using VASP software [Source-code]. Convergence on KPOINTS [Source-code] and ENCUT [Source-code] is done with respect to total energy of the system within 0.001 eV tolerance. Please note convergence on KPOINTS and ENCUT is generally done for target properties, but here we assume energy-convergence with 0.001 eV should be sufficient for other properties also. The points on the curves are obtained with single-point calculation (number of ionic steps, NSW=1 ). However, for very accurate calculations, NSW>1 might be needed.

Structural analysis [Reference]

The following shows the X-ray diffraction (XRD)[Source-code] pattern and the Radial distribution function (RDF) plots [Source-code]. XRD peaks should be comparable to experiments for bulk structures. Relative intensities may differ. For mono- and multi-layer structures , we take the z-dimension during DFT calculation for XRD calculations, which may differ from the experimental set-up.

Thermoelectric properties [Reference]

Thermoelectric properties are calculated using BoltzTrap code [Source-code]. Electron and hole mass tensors (useful for semiconductors and insulators mainly)are given at 300 K [Source-code]. Following plots show the Seebeck coefficient and ZT factor (eigenvalues of the tensor shown) at 300 K along three different crystallographic directions. Seebeck coefficient and ZT plots can be compared for three different temperatures available through the buttons given below. Generally very high Kpoints are needed for obtaining thermoelectric properties. We assume the Kpoints obtained from above convergence were sufficient [Source-code].

WARNING: Constant relaxation time approximation (10^-14 s) and only electronic contribution to thermal conductivity were utilized for calculating ZT.

Electron mass tensor (m_e unit)


0.0	-0.0	0.0
-0.0	0.0	0.0
0.0	0.0	0.0

Hole mass tensor (m_e unit)

0.0	-0.0	0.0
-0.0	0.0	0.0
0.0	0.0	0.0

n-& p-type Seebeck coeff. (µV/K), power-factor (µW/(mK²)), conductivity (1/(Ω*m)), zT (assuming lattice part of thermal conductivity as 1 W/(mK)) at 600K and 10²⁰ cm^-3 doping. For mono/multi-layer materials consider Seebeck-coeff only.)

Property	xx	yy	zz
n-Seebeck	-17.91	-17.91	-17.91
n-PowerFactor	180.02	180.02	180.02
n-Conductivity	561401.18	561401.59	561402.09
n-ZT	0.02	0.02	0.02
p-Seebeck	-18.77	-18.77	-18.77
p-PowerFactor	197.09	197.09	197.09
p-Conductivity	559539.84	559540.24	559540.74
p-ZT	0.02	0.02	0.02

Magnetic moment [Reference]

The orbital magnetic moment was obtained after SCF run. This is not a DFT+U calculation, hence the data could be used to predict zero or non-zero magnetic moment nature of the material only.

Total magnetic moment: 17.7288 μ_B

Magnetic moment per atom: 0.611337931034 μ_B

Magnetization

Elements	s	p	d	tot
Co	-0.005	-0.016	1.664	1.642
Co	-0.003	-0.017	0.31	0.29
Co	-0.003	-0.016	0.318	0.299
Co	-0.004	-0.016	0.25	0.23
Co	-0.003	-0.016	0.321	0.302
Co	-0.004	-0.016	0.25	0.23
Co	-0.003	-0.016	0.321	0.302
Co	-0.003	-0.016	0.318	0.299
Co	-0.003	-0.017	0.31	0.29
Co	-0.003	-0.017	1.169	1.149
Co	-0.003	-0.013	1.303	1.287
Co	-0.003	-0.016	1.217	1.198
Co	-0.003	-0.014	1.242	1.224
Co	-0.003	-0.014	1.242	1.224
Co	-0.004	-0.016	1.217	1.198
Co	-0.004	-0.018	1.169	1.148
Co	-0.003	-0.016	1.217	1.198
Co	-0.004	-0.016	1.217	1.198
Co	-0.004	-0.018	1.169	1.148
Co	-0.003	-0.013	1.303	1.287
Co	-0.003	-0.017	1.169	1.149
Re	-0.005	-0.02	-0.005	-0.03
Re	-0.005	-0.02	-0.005	-0.03
B	-0.008	-0.043	0.0	-0.05
B	-0.008	-0.042	0.0	-0.049
B	-0.008	-0.042	0.0	-0.049
B	-0.007	-0.042	0.0	-0.049
B	-0.007	-0.042	0.0	-0.049
B	-0.008	-0.043	0.0	-0.05

Convergence [Reference]

Structural analysis [Reference]

Thermoelectric properties [Reference]

Electron mass tensor (me unit)

Hole mass tensor (me unit)

n-& p-type Seebeck coeff. (µV/K), power-factor (µW/(mK2)), conductivity (1/(Ω*m)), zT (assuming lattice part of thermal conductivity as 1 W/(mK)) at 600K and 1020 cm-3 doping. For mono/multi-layer materials consider Seebeck-coeff only.)

Magnetic moment [Reference]

See also

Electron mass tensor (m_e unit)

Hole mass tensor (m_e unit)

n-& p-type Seebeck coeff. (µV/K), power-factor (µW/(mK²)), conductivity (1/(Ω*m)), zT (assuming lattice part of thermal conductivity as 1 W/(mK)) at 600K and 10²⁰ cm^-3 doping. For mono/multi-layer materials consider Seebeck-coeff only.)