Nucleation of superconducting vortices by exciting acoustic standing waves in a type-II superconductor

Homogeneous nucleation of crystals by acoustic waves

– In order to study the homogeneous nucleation of crystals in a pressurized liquid, we focused a high-intensity acoustic wave in superfluid helium-4. We studied the scattering of light at the acoustic focus and found the first experimental evidence that, beyond a certain wave amplitude, positive pressure swings crystallize the liquid on their path. We discuss measurements of the nucleation time...

Aligning Nanowires by Standing Surface Acoustic Waves

We present a standing surface acoustic wave (SSAW) based approach to achieve one-dimensional (1D) and two-dimensional (2D) alignment of nanowires (NWs). Our SSAW-based nanowire-aligning technique can be used to construct large-scale (e.g., centimeter scale) network of nanowires within 5 min. In this approach, we use interdigital transducers deposited on a piezoelectric substrate to generate dif...

Observation of Standing Acoustic Waves by Resonant Raman Scattering

A. Mlayah,1 R. Grac,1 G. Armelles,2 R. Carles,1 A. Zwick,1 and F. Briones2 1Laboratoire de Physique des Solides, ERSyCNRS 5646, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France 2Instituto de Microelectronica de Madrid, Consejo Superior de Investigaciones Cientificas, Isaac Newton 8, Parque Tecnologico de Madrid, E-28760 Tres Cantos Madrid, Spain (Received 19 Februar...

Physical Simulation of Baroclinic Waves and Vortices in the Atmosphere

Footpoint excitation of standing acoustic waves in coronal loops

A new theoretical model for the study of slow standing sausage mode oscillations in hot (T > 6 MK) active region coronal loops is presented. These oscillations are observed by the SUMER spectrometer on board the SoHO satellite. The model contains the transition region and the upper chromosphere which enables us to study the entire process of hot loop oscillations – from the impulsive footpoint ...