Acoustoelectric drag current in vanadium oxide films

Two different Mott insulator wires, vanadium dioxide and vanadium sesquioxide, were prepared on the piezoelectric LiNbO3 substrates. Coupling of acoustic waves propagating in LiNbO3 with free carriers in vanadium oxide gives rise to the acoustoelectric effect that manifests itself as the generation of direct electric current by the acoustic wave. According to a phenomenological model, the value of the effect strongly depends on the wires conductivity, which, for the vanadium-oxide films, changes by a few orders of magnitude. We demonstrated that this yields a significant enhancement of the direct current (DC) current generated in the wires at the metal-insulator transition temperatures. The sign of the generated DC voltage is different for excitations by surface and bulk acoustic wave modes, which may happen due to reverse wave propagation at the substrate surface. For each resonance mode, polarities of the generated DC signal are the same in both wires, despite the signs of charge carriers being different for these materials. It was shown that two complementary techniques (acoustoelectric and Hall effect measurements) yield opposite signs of charge carriers in VO2.United States Department of Energy (DOE) DE FG02 87ER-45332 FA9550-16-1-0122 FA9550-18-1-0438 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1160639 CEDENNA through the Financiamiento Basal para Centros Cienticos y Tecnologicos de Excelencia-FB080

Sound Tracks. Tracce, scenari e convergenze negli studi musicali

Il volume raccoglie saggi originali di alcuni dei più autorevoli studiosi di popular music a livello internazionale in diversi ambiti disciplinari (sociologia, semiotica, musicologia, antropologia, media studies, ethnic studies): Simon Frith, "Note introduttive"; John Shepherd, "Dal testo al genere: musica, comunicazione e società"; Franco Fabbri, "Appunti sui generi: da Aristotele a Yahoo!"; Roberto Agostini, "Chimere. Note su alcune musiche (im)popolari contemporanee"; George Lipsitz, "World cities e world beat: la musica come pharmakon"; Steve Jones, "Distribuzione e downloading: la musica e le tecnologie del web"; Anahid Kassabian, "L’ascolto ubiquo"; Francesco D’Amato, "Coordinate e prospettive: le riflessioni sui rapporti fra testo e contesto"The volume contains original essays by some of the most influential popular music scholars in various disciplines (sociology, semiotics, musicology, anthropology, media studies, ethnic studies): Simon Frith, "Introductory Notes"; John Shepherd, "From text to genre: music, communication and society"; Franco Fabbri, "Notes on genres: from Aristotle to Yahoo!"; Roberto Agostini, "Chimeras. Notes on some (un)popular contemporary music"; George Lipsitz, "" World cities and world beat: music as pharmakon"; Steve Jones, "Distribution and downloading: music and Web technologies"; Anahid Kassabian, "Ubiquitous listening"; Francesco D’Amato, "Co-ordinates and perspectives: the relationship between text and context

Subthreshold firing in Mott nanodevices

International audienc