saturday, march 19, 2011

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Saturday, March 19, 2011

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Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

(1)

(2)

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

(within a crystal)

Saturday, March 19, 2011

small band gap

Saturday, March 19, 2011

~

Saturday, March 19, 2011

Saturday, March 19, 2011

Saturday, March 19, 2011

Energy of the electrons with wavenumber k in graphene, calculated in the Tight Binding-approximation. The unoccupied (occupied) states, colored in blue-red (yellow-green), touch each other without energy gap exactly at the above-mentioned six k-vectors.

m*~0Eg=0

Saturday, March 19, 2011