scholarly journals Simple analytical method for determining electrical resistivity and sheet resistance using the van der Pauw procedure

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
F. S. Oliveira ◽  
R. B. Cipriano ◽  
F. T. da Silva ◽  
E. C. Romão ◽  
C. A. M. dos Santos
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Sheet Resistance ◽  
Analytical Method ◽  
Numerical Solutions ◽  
Universal Behavior ◽  
Simple Analytical Method ◽  
Van Der Pauw ◽  
Arbitrary Shapes

Abstract This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The method is compared with previous numerical solutions and available experimental data showing a universal behavior for isotropic conductors. An approximated solution is also reported allowing one to easily determine ρ and RS for samples either with regular or arbitrary shapes.

scholarly journals Weak Localization Effect in Superconductors

1998 ◽  
Vol 12 (19) ◽  
pp. 763-773 ◽  
Author(s):  
Yong-Jihn Kim ◽  
K. J. Chang
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
Sheet Resistance ◽  
Three Dimensional ◽  
Weak Localization ◽  
Transition Temperatures ◽  
Universal Behavior ◽  
Localization Effect ◽  
Disordered Superconductors ◽  
Good Agreement

We investigate the effect of weak localization on the transition temperatures of superconductors using Anderson's time-reversed scattered-state pairs, and show that disorder weakens electron–phonon interactions. With solving the BCS T c -equation, the calculated values for T c are in good agreement with experimental data for various two- and three-dimensional disordered superconductors. We find that the critical sheet resistance for the suppression of superconductivity in thin films does not satisfy the universal behavior but depends on sample, in good agreement with experiments.

Evaluation of Semisubmersible Motion Characteristics

1986 ◽  
Vol 23 (03) ◽  
pp. 217-225
Author(s):  
Sobhan Sengupta ◽  
M.K. Chatterjee
Keyword(s):  
Experimental Data ◽  
Analytical Method ◽  
Cost Effective ◽  
Design Consideration ◽  
Deepwater Drilling ◽  
Simple Analytical Method ◽  
Motion Characteristics ◽  
Improved Design ◽  
Effective Design ◽  
Platform Motions

Semisubmersibles are the most widely used offshore mobile units for deepwater drilling. Because of their improved motion characteristics they provide a more stable drilling platform. This feature of improved motion characteristics has become an important cost-effective design consideration as larger and more expensive drilling units are needed for deeper water and harsher environments. This paper presents a simple analytical method to compute semisubmersible motion characteristics. Programmed in a microcomputer, this becomes an important tool for designers to identify the important parameters affecting the platform motions, to study their effects, and then to choose desirable values of these parameters for improved design. The program is verified with experimental data, and example applications are given.

scholarly journals Analytical Evaluation of the Hadron Number in Extensive Air Showers for Rising Inelasticity

1984 ◽  
Vol 39 (12) ◽  
pp. 1172-1174 ◽  
Author(s):  
Jiben Sidhanta ◽  
Rajkumar Roychoudhury
Keyword(s):  
Experimental Data ◽  
Energy Range ◽  
Cross Section ◽  
Excellent Agreement ◽  
Analytical Method ◽  
Numerical Solutions ◽  
High Energy ◽  
Analytical Evaluation ◽  
Air Showers ◽  
Air Shower

A purely analytical method is presented in this paper for evaluating the average number of hadrons (in an air shower) with a given energy as the inelasticity of the cross-section rises. Our result is found to be in excellent agreement with numerical solutions and also with experimental data, particularly in the high energy range.

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

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