Time Dependence of Mechanical Breakdown in Bundles of Fibers. III. The Power Law Breakdown Rule

1958 ◽  
Vol 2 (1) ◽  
pp. 195-218 ◽  
Author(s):  
Bernard D. Coleman
Keyword(s):  
Time Dependence ◽  
Power Law ◽  
Mechanical Breakdown

Time Dependence of Mechanical Breakdown Phenomena

1956 ◽  
Vol 27 (8) ◽  
pp. 862-866 ◽  
Author(s):  
Bernard D. Coleman
Keyword(s):  
Time Dependence ◽  
Mechanical Breakdown

The power law time dependence of (R2) in nonequilibrium growth

1993 ◽  
Vol 5 (27) ◽  
pp. 4721-4728 ◽  
Author(s):  
M C Tringides ◽  
C M Soukoulis ◽  
P Lavenberg
Keyword(s):  
Time Dependence ◽  
Power Law ◽  
Nonequilibrium Growth

STEP DYNAMICS ON VICINAL Al(11{2m+1}) SURFACES

1994 ◽  
Vol 01 (04) ◽  
pp. 611-614 ◽  
Author(s):  
P.A. GRAVIL ◽  
S. HOLLOWAY
Keyword(s):  
Molecular Dynamics ◽  
Time Dependence ◽  
Molecular Dynamics Simulations ◽  
Power Law ◽  
Time Exponent ◽  
Step Dynamics ◽  
Dynamics Simulations ◽  
Reduced Time

The motion of steps on (113), (115), and (117) surfaces of aluminium has been studied by molecular dynamics simulations. The time dependence of the position fluctuations was found to show a power-law dependence, tn, where 0.25<n≤0.5. We conclude that step meandering occurs by the exchange of atoms between steps. For noninteracting steps this corresponds to a time exponent of n=0.5. The reduced time dependence is then due to the repulsion between the steps.

Time Dependence of the Metastable, Optically-Induced Esr in a-Si:H

1986 ◽  
Vol 70 ◽  
Author(s):  
C. Lee ◽  
W. D. Ohlsen ◽  
P. C. Taylor
Keyword(s):  
Time Dependence ◽  
Spin Density ◽  
Power Law ◽  
White Light ◽  
Monochromatic Light ◽  
Extended Range ◽  
Unique Power ◽  
Spin Densities ◽  
Optically Induced

ABSTRACTThe occurrence of optically-induced, metastable changes in the paramagnetism in films of a-Si:H is well known. The effect was first observed with white light in powdered samples, but recent experiments with both white and monochromatic light incident on films on substrates have observed a similar effect. This optically-induced ESR appears to be stable at temperatures < 400 K. Typical inducing curves for samples with initial dark spin densities ns > 1016 spins/cm3 approach a power law behavior (ns ∼ t1 / 3) at long times. However, when the dark spin density is less than 1016 spins/cm3, the samples exhibit an inducing curve (on a log-log scale) with a continuously decreasing slope. The curve does not exhibit a unique power law behavior over an extended range of time and is at all times < t1 / 3.

Two-Level System Dynamics in the Long-Time Limit: A Power-Law Time Dependence

1996 ◽  
Vol 76 (12) ◽  
pp. 2085-2088 ◽  
Author(s):  
H. Maier ◽  
B. M. Kharlamov ◽  
D. Haarer
Keyword(s):  
System Dynamics ◽  
Time Dependence ◽  
Power Law ◽  
Time Limit ◽  
Level System ◽  
Long Time

Quantum dots with indirect band gap: power-law photoluminescence decay

2014 ◽  
Vol 11 (5) ◽  
pp. 507-512
Author(s):  
Karel Král ◽  
Miroslav Menšík
Keyword(s):  
Quantum Dots ◽  
Time Dependence ◽  
Band Gap ◽  
Conduction Band ◽  
Power Law ◽  
Theoretical Treatment ◽  
Photoluminescence Intensity ◽  
Lattice Vibrations ◽  
Slow Decay ◽  
Photoluminescence Decay

In this work the experimental effect of a slow decay of the photoluminescence is studied theoretically in the case of quantum dots with an indirect energy band gap. The slow decay of the photoluminescence is considered as decay in time of the luminescence intensity, following the excitation of the quantum dot sample electronic system by a short optical pulse. In the presented theoretical treatment the process is studied as a single dot property. The inter-valley deformation potential interaction of the excited conduction band electrons with lattice vibrations is considered in the self-consistent Born approximation to the electronic self-energy. The theory is built on the non-equilibrium electronic quantum transport theory. The time dependence of the photoluminescence decay is estimated upon using a simple effective mass model. The numerical calculation of the considered model shows the power-law time characteristics of the photoluminescence decay in the long-time limit of the decay. We demonstrate that the nonadiabatic influence of the interaction of the conduction band electrons with the lattice vibrations provides a mechanism giving us the power-law time dependence of the photoluminescence intensity signal. This theoretical result emphasizes the role of the electron-phonon interaction in the nanostructures.

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