We report the measurement of efficient charge-to-spin conversion at room temperature in Weyl semimetal/ferromagnet heterostructures with both oxidized and pristine interfaces. Polycrystalline films semimetal, TaAs, are grown by molecular beam epitaxy on (001) GaAs interfaced a metallic ferromagnet (Ni$_{0.8}$Fe$_{0.2}$). Spin torque ferromagnetic resonance (ST-FMR) measurements samples an inter...

The boundary between the type I and II Weyl semimetals serves as event horizon for "relativistic" fermions. interior of black hole is represented by semimetal, where Fermi surface formed. process filling electrons results in relaxation inside horizon. This leads to Hawking radiation reconstruction vacuum state. After fully occupied, region reaches equilibrium state, which absent. If this scenar...

We propose a device in which sheet of graphene is coupled to Weyl semimetal, allowing for the physical access study tunneling from two- three-dimensional massless Dirac fermions. Because reconstructed band structure, we find that this acts as robust valley filter electrons sheet. show that, by appropriate alignment, semimetal draws away current one two valleys, while other pass unimpeded. In co...

Abstract We study a two-band dispersive Sachdev-Ye-Kitaev (SYK) model in 1 + dimension. suggest that describes semimetal with quadratic dispersion at half-filling. compute the Green's function saddle point using combination of analytical and numerical methods. Employing scaling symmetry Schwinger-Dyson equations becomes transparent strongly limit, we show exact solution problem yields distinct ...