# Course Introduction to Solid State Physics

Structure, transport and interaction in solid matter
Level 3 (with higher mathematics)
Level 3 requires the basics of vector calculus, differential and integral calculus. Suitable for undergraduates and high school students.
1. 1
Lesson

## Density of States (1d, 2d, 3d) of a Free Electron Gas

Here you will learn how to derive the 1d, 2d, and 3d density of states of a free electron gas from the k-volume and the dispersion relation.

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## Free electron gas in 1d (density of states)

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2. 2
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## Group Velocity (Oscillation of a Monatomic Chain)

3. 3
1. Why are lattice vibrations called optical and acoustic?
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## Dispersion Relation (Crystal with Diatomic Basis)

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4. 4
Lesson

## Drude Model and the Classical Charge Transport in Metals

Drude model establishes the linear relationship between the E-field and the current density, determines the electrical conductivity and mobility.

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## Drude Model (Current Density, Mean Free Time, E-field)

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5. 5
Lesson

## Epitaxy and 3 Important Techniques for Fabrication of Heterostructures

Here you will learn the basics of epitaxy (crystal growth), as well as different growth models and epitaxial techniques.

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6. 6
Lesson

## Photolithography: How to Make a Circuit in 7 Easy Steps

Here you will learn how integrated circuits in semiconductor technology are manufactured step by step using lithography technique.

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