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
08/20/2019 8:34:47 PM PDT by
HandyDandy
(All right then I will go to hell. Huckleberry Finn)
To: HandyDandy
“The sets give graphene a valley degeneracy of gv = 2.” Impressive. I hope to understand after studying physics in ten years. Batteries: No such thing as a free lunch.
To: HandyDandy
How long will it run the phone before it goes tits-up? iphones are dead at about 2 to 3 hours.
13 posted on
08/20/2019 9:08:57 PM PDT by
fella
("As it was before Noah so shall it be again,")
To: 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. I'm pretty sure this is an eloquent and reasoned explanation of carbon conductors. I understood the first and lat words in the paragraph....Dirac points???? I enjoyed reading it, thanks for posting.
14 posted on
08/20/2019 9:11:10 PM PDT by
SandwicheGuy
(*The butter acts as a lubricant and speeds upd all the CPU)
To: HandyDandy
“The sets give graphene a valley degeneracy of gv = 2”
Free associating to Ellen DeGeneres, I then thought Graphene could be a good stage name for a drag queen, with a gay velocity of 2. After that, I realized my thoughts hurt, and it’s late.
17 posted on
08/20/2019 9:49:22 PM PDT by
bluejean
(I'm becoming a cranky old person. It really annoys me.)
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