Magnetoacoustic effects of electrical conductivity tensors for nonellipsoidal nonparabolic band structure

1974 ◽  
Vol 9 (8) ◽  
pp. 3337-3346 ◽  
Author(s):  
Chhi-Chong Wu ◽  
Jensan Tsai
Keyword(s):  
Electrical Conductivity ◽  
Band Structure

Band Structure and Thermoelectric Properties of Ni(x)Zn(1-x)Fe2O4

2021 ◽  
Vol 317 ◽  
pp. 28-34
Author(s):  
Joon Hoong Lim
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Band Structure ◽  
Seebeck Coefficient ◽  
Band Gap ◽  
Thermoelectric Properties ◽  
Xrd Analysis ◽  
Valence Band Maximum ◽  
Solid State Method ◽  
Ni Content

Thermoelectric materials has made a great potential in sustainable energy industries, which enable the energy conversion from heat to electricity. The band structure and thermoelectric properties of Ni(x)Zn(1-x)Fe2O4 have been investigated. The bulk pellets were prepared from analytical grade ZnO, NiO and Fe2O3 powder using solid-state method. It was possible to obtain high thermoelectric properties of Ni(x)Zn(1-x)Fe2O4 by controlling the ratios of dopants and the sintering temperature. XRD analysis showed that the fabricated samples have a single phase formation of cubic spinel structure. The thermoelectric properties of Ni(x)Zn(1-x)Fe2O4 pellets improved with increasing Ni. The electrical conductivity of Ni(x)Zn(1-x)Fe2O4 pellets decreased with increasing Ni content. The electrical conductivity of Ni(x)Zn(1-x)Fe2O4 (x = 0.0) is (0.515 x10-3 Scm-1). The band structure shows that ZnxCu1-xFe2O4 is an indirect band gap material with the valence band maximum (VBM) at M and conduction band minimum (CBM) at A. The band gap of Ni(x)Zn(1-x)Fe2O4 increased with increasing Ni content. The increasing band gap correlated with the lower electrical conductivity. The thermal conductivity of Ni(x)Zn(1-x)Fe2O4 pellets decreased with increasing Ni content. The presence of Ni served to decrease thermal conductivity by 8 Wm-1K-1 over pure samples. The magnitude of the Seebeck coefficient for Ni(x)Zn(1-x)Fe2O4 pellets increased with increasing amounts of Ni. The figure of merit for Ni(x)Zn(1-x)Fe2O4 pellets and thin films was improved by increasing Ni due to its high Seebeck coefficient and low thermal conductivity.

Band Structure and Electrical Conductivity of NiO

1968 ◽  
Vol 21 (14) ◽  
pp. 1010-1013 ◽  
Author(s):  
Julius Feinleib ◽  
David Adler
Keyword(s):  
Electrical Conductivity ◽  
Band Structure

Computational Analysis of Strain Effects on Electrical Transport Properties of Crystalline Nanocomposite Thin Films

2011 ◽  
Author(s):  
Hua Li ◽  
Gang Li
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Band Structure ◽  
Transport Properties ◽  
Electrical Transport ◽  
Electronic Band Structure ◽  
Electrical Transport Properties ◽  
Electronic Band ◽  
Strain Effects ◽  
Nanocomposite Thin Films

In this work, we model the strain effects on the electrical transport properties of Si/Ge nanocomposite thin films. We utilize a two-band k·p theory to calculate the variation of the electronic band structure as a function of externally applied strains. By using the modified electronic band structure, electrical conductivity of the Si/Ge nanocomposites is calculated through a self-consistent electron transport analysis, where a nonequilibrium Green’s function (NEGF) is coupled with the Poisson equation. The results show that both the tensile uniaxial and biaxial strains increase the electrical conductivity of Si/Ge nanocomposite. The effects are more evident in the biaxial strain cases.

`Band structure' and electrical conductivity of disordered layered systems

1996 ◽  
Vol 8 (41) ◽  
pp. 7677-7688 ◽  
Author(s):  
P Weinberger ◽  
P M Levy ◽  
J Banhart ◽  
L Szunyogh ◽  
B Újfalussy
Keyword(s):  
Electrical Conductivity ◽  
Band Structure ◽  
Layered Systems

Electrical conductivity and band structure of thin polycrystalline EuS films

2013 ◽  
Vol 55 (5) ◽  
pp. 1074-1077 ◽  
Author(s):  
V. V. Kaminskii ◽  
N. N. Stepanov ◽  
M. M. Kazanin ◽  
A. A. Molodykh ◽  
S. M. Solov’ev
Keyword(s):  
Electrical Conductivity ◽  
Band Structure ◽  
Thin Polycrystalline

Synthesis, Structure, Electrical Conductivity, and Band Structure of the Rare-Earth Copper Oxychalcogenide La5Cu6O4S7

2000 ◽  
Vol 155 (2) ◽  
pp. 366-371 ◽  
Author(s):  
Fu Qiang Huang ◽  
Paul Brazis ◽  
Carl R. Kannewurf ◽  
James A. Ibers
Keyword(s):  
Electrical Conductivity ◽  
Rare Earth ◽  
Band Structure ◽  
The Rare Earth

Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts: Intrinsic activity trends, electrical conductivity, and electronic band structure

Nano Research ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 2288-2295 ◽  
Author(s):  
Michaela Burke Stevens ◽  
Lisa J. Enman ◽  
Ester Hamal Korkus ◽  
Jeremie Zaffran ◽  
Christina D. M. Trang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Band Structure ◽  
Oxygen Evolution ◽  
Electronic Band Structure ◽  
Intrinsic Activity ◽  
Electronic Band ◽  
Activity Trends

Conduction bands of GaxIn1−xAs and InAsxSb1−xalloys

1970 ◽  
Vol 48 (4) ◽  
pp. 463-469 ◽  
Author(s):  
William M. Coderre ◽  
John C. Woolley
Keyword(s):  
Electrical Conductivity ◽  
Band Structure ◽  
Valence Band ◽  
Conduction Band ◽  
High Temperatures ◽  
Hall Coefficient ◽  
Solidus Temperature ◽  
Energy Separation ◽  
Conduction Bands ◽  
Valence Bands

Measurements of Hall coefficient and electrical conductivity have been made on alloys of the systems GaxIn1−xAs and InAsxSb1−xover a range of temperature from 200 up to 950 °K or to 20° below the solidus temperature of the particular specimen, whichever was lower. These data have then been analyzed in terms of equations involving all the occupied conduction and valence bands in the manner described previously by Coderre and Woolley. The results give the variation of the energy separation from the valence band of the (000) conduction-band minimum as a function of the composition and temperature for both alloy systems. For a certain range of x in the InAsxSb1−x alloys, a transition to the gray-tin band structure is observed at high temperatures.

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