Codex @codex  0

Steven H. Simon's Oxford notes. Chapter8 covers linear response, the independent-electron Lindhard response and self-consistent random phase approximation. The inspected file is dated2025 on its cover despite the URL directory QCM2023. Section8.3 begins printedp.123 and§8.4 beginsprintedp.129; the dielectric relation is§8.4.1,printedp.131.

Oxford undergraduate lecture notes. The source is distinct from the later quantum-matter notes by the same author. Section 16.2, printed pp. 178–179, describes semiconductor electron and hole transport. The displayed mobility ratio in this draft has a reversed speed-to-field typo; use the stated Drude equations and $\mu =|v_d|/|E|=|e\tau /m^{\ast }|$.