ee606_s04_lecture3

ee606_s04_lecture3 - EE606 SOLID STATE DEVICES PURDUE...

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Unformatted text preview: EE606 SOLID STATE DEVICES PURDUE University Lecture 3: Elements of Quantum Mechanics (part 1) Reference Vol. 6, Ch. 2 (pages 23-32) Topics • The Quantum Concept • Basic Quantum Formulation Original Problem Periodic Structure Electrons in periodic potential: Problem we want to solve Do I really need Quantum Mechanics ? If these were large objects, Newton’s mechanics would work, but in a micro-world …… Proof of Breakdown of Classical Mechanics: Quantum Concept • Blackbody Radiation • Photoelectric Effect • Bohr Atom • Wave Particle Duality Blackbody Radiation In 19 th century, thermodynamics was immensely successful in explaining a wide variety of phenomena, however it could not explain the spectra of a blackbody radiation. low Temperature High Temperature infra-red ultra-violet Long λ (∼ 10 µ m) Short λ(∼ 100nm) u ∼ kT/ λ 4 log(u) ∼ ln(T) – 4 log λ Equi-partition + Mode Coupling u ∼ exp(- β / λ T)/ λ 5 Wein’s formula Plank’s “Fitting” Formula...
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This note was uploaded on 12/12/2010 for the course ECE 606 taught by Professor Staff during the Spring '08 term at Purdue.

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ee606_s04_lecture3 - EE606 SOLID STATE DEVICES PURDUE...

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