18 Bandstructure 3 - Fundamentals of Nanoelectronics...

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Fundamentals of Fundamentals of Nanoelectronics Nanoelectronics Prof. Supriyo Datta ECE 453 Purdue University Network for Computational Nanotechnology 10.06.2004 Lecture 18: Bandstructure 3 Ref. Chapter 5.1 & 5.2
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Review 00:03 • Last time we talked about the principle of bandstructure which allows one to calculate the energy levels of a periodic structure. In particular we talked about a dimerized solid which has two atoms per unit cell. • The dispersion relation looks like: • Today we want to expand this idea to a higher dimension: 2D. • In particular we’ll use the principle of bandstructure to describe the energy levels of graphene… 1 1’ 2 2’ 3 3’ N N’ " a {}{} = ikna n e 0 ϕ { } ( ) [ ]{ } 0 0 k h E = = N N E φ # # 2 1 2 1 Every row looks the same E k 1 N
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Graphene: Atomic Orbitals 05:55 GRAPHENE • The importance of this material comes in
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18 Bandstructure 3 - Fundamentals of Nanoelectronics...

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