JVASP-26823_Ba3NiIr2O9
JARVIS-ID:JVASP-26823 Functional:optB88-vdW Primitive cell Primitive cell Conventional cell Conventional cell
Chemical formula:Ba3NiIr2O9 Formation energy/atom (eV):-1.799 a 5.785 Å α:90.0 ° a 5.785 Å α:90.0 °
Space-group :P6_3/mmc, 194 Relaxed energy/atom (eV):-4.5712 b 5.785 Å β:90.0 ° b 5.785 Å β:90.0 °
Calculation type:Bulk SCF bandgap (eV):0.006 c 14.33 Å γ:120.0 ° c 14.33 Å γ:120.0 °
Crystal system:hexagonal Point group:6/mmm Density (gcm-3):7.99 Volume (3):415.27 nAtoms_prim:30 nAtoms_conv:30
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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 (me unit)

0.0 -0.0 0.0
-0.0 0.0 -0.0
0.0 -0.0 0.0

Hole mass tensor (me 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/(*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 32.61 46.65 46.65
n-PowerFactor 129.77 184.87 184.87
n-Conductivity 84946.8 84946.83 122021.04
n-ZT 0.03 0.05 0.05
p-Seebeck 32.04 46.01 46.01
p-PowerFactor 126.13 182.0 182.0
p-Conductivity 85982.76 85982.79 122903.31
p-ZT 0.03 0.05 0.05

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: 9.0966 μB

Magnetic moment per atom: 0.30322 μB

Magnetization
Elementsspdtot
Ba0.0010.0050.0040.01
Ba0.0010.0050.0040.01
Ba0.00.0030.0010.005
Ba0.00.0030.0010.005
Ba0.00.0030.0010.005
Ba0.00.0030.0010.005
Ni0.0020.01.6161.618
Ni0.0020.01.6161.618
Ir0.0120.0170.6910.72
Ir0.0120.0170.6910.72
Ir0.0120.0170.6910.72
Ir0.0120.0170.6910.72
O0.0020.0920.00.094
O0.0020.0940.00.096
O0.0020.0980.00.1
O0.0020.0980.00.1
O0.0020.0940.00.096
O0.0020.0920.00.094
O0.0090.1390.00.149
O0.0090.1390.00.148
O0.010.1520.00.162
O0.010.1520.00.162
O0.0090.1390.00.148
O0.0090.1390.00.149
O0.0090.1390.00.148
O0.0090.1390.00.149
O0.010.1520.00.162
O0.010.1520.00.162
O0.0090.1390.00.149
O0.0090.1390.00.148

See also

Links to other databases or papers are provided below


mp-556189

ICSD-ID: 33530

AFLOW link

MP link
mp-556189

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