[HandyDandy]

Graphene is a zero-gap semiconductor, because its conduction and valence bands meet at the Dirac points. The Dirac points are six locations in momentum space, on the edge of the Brillouin zone, divided into two non-equivalent sets of three points. The two sets are labeled K and K'. The sets give graphene a valley degeneracy of gv = 2. By contrast, for traditional semiconductors the primary point of interest is generally Γ, where momentum is zero. Four electronic properties separate it from other condensed matter systems.

[roadcat]

Graphene is a zero-gap semiconductor, because its conduction and valence bands meet at the Dirac points.

How can I decipher all of what you said? Can I ask Meryl Streep or Tom Hanks? They're always talking like they know stuff. /s

(I was an IT engineer for decades before retiring, was asked by receptionists and others if they could get my job after taking a course or two at the local community college. I would laugh in their faces, and say no...)