固態物理-13A-半古典模型應用 The semiclassical theory of conduction in metals

應用半古典模型，並考慮碰撞效應以及relaxation time的近似，推導出「非平衡狀態的電子分佈機率」（Non-equilibrium electron distribution function）。用來描述金屬材料在沒有外界磁場的情況下，直流電的電導率。
-----
This lecture introduces and derives the non-equilibrium electron distribution function and applies it to a DC electrical conductivity of metals.

00:00 可開啟CC字幕
01:22 Overview of this lecture
02:50 Relaxation time approximation
07:10 Non-equilibrium distribution function form
11:41 “Survival” probability
16:04 Non-equilibrium distribution function for general cases
20:33 Derivation of time-derivative of equilibrium distribution function
24:37 Simplification for metals
27:53 Non-equilibrium distribution function for metals
30:19 DC electrical conductivity
34:53 Conclusion