Dirac cones, named after the renowned physicist Paul Dirac, are unique features found in the electronic band structures of certain materials, such as graphene and topological insulators. These cones ...

Scientists have observed novel helical magnetic ordering in the topological compound EuIn2As2 which supports exotic electrical conduction tunable by a magnetic field. Scientists at the U.S. Department ...

Diffraction is a natural property of light beams. It allows light to bend around obstacles. Because light serves as a carrier of information, some of the distorting effects of diffraction must be ...

In a medium with a refractive index of zero n = 0, the effective wavelength becomes infinite, λ = 2πc/ωn→∞, and the spatial phase distribution of a propagating wave becomes uniform over the entire ...