نتایج جستجو برای: carrier relaxation time
تعداد نتایج: 2005455 فیلتر نتایج به سال:
Relaxation of thermal-remanent magnetization and isothermal remanent magnetization of spin glass in Cd& „Mn„Te diluted magnetic semiconductors have been studied at different conditions. Magnetization relaxation can be described by a power-law decay, M(t) =Mpt (f & to and to=2 s) with small values of a or a logarithmic decay M(t}=MD(1—a lnt) (t & to and to=2 s). Temperature and applied magnetic-...
– The dynamics of the 2D Coulomb glass model is investigated by kinetic Monte Carlo simulation. An exponential divergence of the relaxation time signals a zero-temperature freezing transition. At low temperatures the dynamics of the system is glassy. The local charge correlations and the response to perturbations of the local potential show aging. The dynamics of formation of the Coulomb gap is...
nitroglycerin has a relaxing effect on the smooth muscles of organs including uterus. this study investigates the effect of intravenous nitroglycerin in emergency cesarean sections in which rapid and transient uterine relaxation for rapid and nontraumatic extraction of the fetus is necessary. sixty pregnant women who were been candidates for emergency cesarean and needed rapid uterine relaxatio...
We examined the mechanisms underlying free carrier generation in a very topical PM6/Y6 organic solar cell. observed slow yet efficient spatial charge dissociation driven by downhill energy relaxation through interfacial cascade.
Deuterated oxides exhibit prolonged hot carrier lifetimes at room temperature. We report evidence that this improved hot carrier hardness exists over the temperature range between -25 °C and 200 °C. However, the benefit of deuterium incorporation deceases with increasing stress temperature. Furthermore the VT -shift shows a remarkable absence of temperature dependence for the deuterated samples...
results the results showed that compared to the control group, relaxation (23.2) and positive self-talk (21.25) treatment methods alone can reduce pms (p < 0.001). on the other hand, a combined (relaxation + positive self-talk) treatment method (13.75) was more effective in reducing pms compared to relaxation or positive self-talk alone. conclusions it seems that psychological therapy based on ...
The accurate description of carrier transport in emerging devices based on Boltzmann’s equation (BTE) is of fundamental importance. The BTE is conventionally solved by applying the Monte-Carlo (MC) technique, which is very accurate but time consuming [1, 2]. A more efficient way to find approximate solutions is the method of moments. For an accurate description of carrier transport it is import...
We recently published a study concerning femtosecond pump–probe absorption edge spectroscopy of cubic GaN (fundamental bandgap: 3.23 eV), resulting in the transient dielectric function. In present study, we continue our investigations those measurements by determining time-dependent transition energy at Fermi-vector between conduction and valence bands. The generation electron–hole pairs 266 nm...
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Thermalization and relaxation of photoexcited carriers play an important role in ultrafast demagnetization photoinduced phase transitions. However, direct observation carrier thermalization metals is highly challenging due to its fast timescale. Here, the authors track electrons nickel real time with few-femtosecond core-level transient absorption spectroscopy. In addition, a method extract tem...
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