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【正文】 ()T i ght bindi ng c a l c ul a t i on o n ba nds:, ( ) * ( ) , ( ) [ 1 ] ( ) | ( ) | 3atppik a ik appH H H kE f kuuHuuf k Ef k e eE k E f kE?????????? ? ? ????? ? ? ???? ? ? ???? ? ???? ? ?1 2 2 122 c os 2 c os 2 c os ( ) 1 4 c os ( 3 / 2) 4 c os( 3 / 2) c o s( 3 / 2) 39。Optics on Graphene GateVariable Optical Transitions in Graphene Feng Wang, Yuanbo Zhang, Chuanshan Tian, Caglar Girit, Alex Zettl, Michael Crommie, and Y. Ron Shen, Science 320, 206 (2022). Direct Observation of a Widely Tunable Bandgap in Bilayer Graphene Yuanbo Zhang, TsungTa Tang, Caglar Girit1, Zhao Hao, Michael C. Martin, Alex Zettl1, Michael F. Crommie, Y. Ron Shen and Feng Wang (2022) Graphene (A Monolayer of Graphite) 2D Hexagonal lattice Electrically: High mobility at room temperature, Large current carrying capability Mechanically: Large Young’s modulus. Thermally: High thermal conductance. Properties of Graphene Quantum Hall effect, Barry Phase Ballistic transport, Klein paradox Others Exotic Behaviors Quantum Hall Effect Y. Zhang et al, Nature 438, 201(2022) Optical Studies of Graphene Optical microscopy contrast。 Raman spectroscopy。 ne a r K poi nt sp x x ypFk a k a
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