To: 2ndDivisionVet
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.
11 posted on
05/23/2016 4:18:32 PM PDT by
HandyDandy
(Don't make up stuff. It wastes time.)
To: HandyDandy
the primary point of interest is generally Γ
14 posted on
05/23/2016 4:50:51 PM PDT by
golux
To: HandyDandy
To: HandyDandy
...that’s what I’m talkin’ about!
27 posted on
05/25/2016 7:17:54 AM PDT by
Pelham
(Trump/Tsoukalos 2016 - vote the great hair ticket)
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