Yu. V. Gulyaev (together with V. I. Pustovoit) first expressed the idea of using surface acoustic waves (SAW) for signal processing and proposed a layered piezoelectric-semiconductor structure as the basic design of the corresponding devices. Yu. V. Gulyaev (independently and simultaneously with the American physicist Blustein) discovered a new fundamental type of surfactant (surface acoustic waves) in piezoelectric materials that are known in world literature as Blustein – Gulyaev waves [1]. Together with his colleagues, he studied a new class of kinetic phenomena in conducting solids associated with electron dragging of acoustic waves, investigated resonant and nonlinear acousto-optical effects in conducting and active media, predicted “second” spin waves, and studied the interaction of spin waves with electrons in ferromagnets and layered ferromagnet-semiconductor structures, the dependence of photoconductivity on the polarization of incident radiation is predicted, and a strong field prediction and experimentally obtained I field emission of electrons in a vacuum of carbon nanotubes and nanoclusters.