The thermoelectric properties of quasi-one-dimensional (Q1D) organic crystals with p-type conduction band are studied. Two main electron-phonon interaction mechanisms and carriers scattering on impurities are taken into account. The relaxation time as a function of carrier energy is analyzed for different values of crystal parameters. It is shown that under certain conditions, when the interfer...

The spin and phase coherence times of the itinerant electrons in n-InSb thin films were experimentally determined by analyzing the low-temperature magnetoresistance in antilocalization theory. The results indicate a very weak temperature dependence below 10 K for the spin coherence time. The dependence of the spin coherence time on carrier density demonstrates that the Elliott-Yafet mechanism i...

We have found experimentally, that the exciton luminescence rise times in GaAdAlGaAs quantum wells oscillate as a function of incident laser energies. Guided by MonkCarlo simulations we interpret these results as the occurrence of selective LO-phonon assisted exciton formation. In the photoexcitation of semiconductors excitons can be generated either directly with high momentum or by free elect...

after springs production, different residual stresses are created in the inner and outer surfaces of spring wires. some of these stresses for example compressive residual stresses are useful and some are harmful. the effects of vareation of these stresses are caused spring relaxation and decrising in their free length when they are loaded intermittently. for review this phenomena in this resear...

introduction: nano-indentation has recently been employed as a powerful tool for determining the mechanical properties of biological tissues on nano and micro scales. a majority of soft biological tissues such as ligaments and tendons exhibit viscoelastic or time-dependent behaviors. the constitutive characterization of soft tissues is among very important subjects in clinical medicine and espe...