The electrons found in Dirac materials are notorious for being difficult to manipulate due to the Klein phenomenon and absence of backscattering. Here we investigate how spatial modulations of the Fermi velocity in two-dimensional Dirac materials can give rise to locali...

International audience; Sphingolipid metabolism is tightly controlled by enzymes to regulate essential processes in human physiology. The central metabolite is ceramide, a pro-apoptotic lipid catabolized by ceramidase enzymes to produce pro-proliferative sphingosine-1ph...

J. M. G-P. was supported by the predoctoral research grant awarded by the Spanish Ministerio de Educación, Cultura y Deporte (FPU16/01972). C.O. acknowledges funding by the Ramón y Cajal Programme (Grant RYC-2014-15036) and the STEADY project (Grant CGL2017-83198-R) fun...