Lecture 6

ETE411 :: Semiconductor

The Uncertainty Principle

• First statement: it is impossible to simultaneously describe with absolute accuracy the position and momentum of a particle.

Modified Planck's constant

second statement

• it is impossible to simultaneously describe with absolute accuracy the energy of a particle and the instant of time the particle has this energy.

the uncertainty principle is only significant for subatomic particles.

SCHRODINGER'S WAVE EQUATION

• The Wave Equation: The one-dimensional, nonrelativistic Schrodinger's wave equation is given by,

The Potential Barrier

The wave functions through the potential barrier

EXAMPLE 2.5

P.45 E2.8 and E2.10P.51 2.5, 2.6, 2.7, 2.9

Introduction to the QuantumTheory of Solids

Chapter 3

ALLOWED AND FORBIDDEN ENERGY BANDS

Formation of Energy Bands

Summery of lecture 6