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Time-resolved optical techniques are used to explore electron spin dynamics in bulk and epilayer samples of n-type ZnO as a function of temperature and magnetic field. The bulk sample yields a spin coherence time T 2 * of 20 ns at T = 30 K. Epilayer samples, grown by pulsed laser deposition, show a maximum T 2 * of 2 ns at T = 10 K, with spin precession(More)
Understanding the effect of defects on mechanical responses and failure behaviors of a graphene membrane is important for its applications. As examples, in this paper, a family of graphene with various 5-8-5 defects are designed and their mechanical responses are investigated by employing molecular dynamics simulations. The dependence of fracture strength(More)
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