R. G. Herb Condensed Matter Seminars
valence and conduction bands touch at isolated points (Weyl nodes)
in the Brillouin zone. This gives rise to unusual electronic properties
of these materials. In particular, Weyl semimetals host peculiar
surface electron states whose Fermi lines have the form of open arcs.
I will show that static electric fields that are necessarily present
near the crystal surface result in a spiraling structure of Fermi arcs.
The winding angle of the spiral is controlled by the chirality of the Weyl
node and the magnitude of the surface potential. I will also discuss
magnetoresistance of a pn-junction in a Weyl semimetal.