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[ÇóÖú] ±½ÎªÊ²Ã´ÓÐlarge HOMO-LUMO gap? ¶øÊ¯Ä«Ï©ÊÇzero gap?

the benzene molecule has a large HOMO-LUMO gap , while graphene is a zero gap semiconductor where the conduction band and the valence band touch at one point at the Fermi level
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