manfra28-2011 - Physics 342 Lecture 28 Band Theory of...

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1 Physics 342 Lecture 28 Physics 342 Lecture 28 Band Theory of Electronic Structure Band Theory of Electronic Structure in Solids in Solids Problems from Chapter 10: 1, 6, 7, 9, 10, 14, 18, 19, 20 and 23 Due next Wednesday the 20th Read Chapter 11 We will be discussing a lot about semiconductors and metals
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2 Band Theory of Solids Band Theory of Solids To understand the electronic states of a solid we must consider the presence of many N~10 23 atoms The band theory of solids describes the interaction between the electrons and the lattice ions that comprise a solid
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3 Phys 320 - Baski Solid of N atoms Two atoms Six atoms Band Theory Band Theory : : “Bound” Electron Approach “Bound” Electron Approach For the total number N of atoms in a solid (10 23 cm –3 ), N energy levels split apart within a width E. Leads to a band of energies for each initial atomic energy level (e.g. 1s energy band for 1s energy level). Electrons must occupy different energies due to Pauli Exclusion principle.
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Band Theory of Solids Band Theory of Solids
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This note was uploaded on 04/23/2011 for the course PHYS 342 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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manfra28-2011 - Physics 342 Lecture 28 Band Theory of...

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