X-Git-Url: https://hackdaworld.org/gitweb/?p=lectures%2Flatex.git;a=blobdiff_plain;f=solid_state_physics%2Ftutorial%2F2_01s.tex;h=033c8ae2702dfe6cab0e232e27b839759de98d33;hp=a89285334154eae2075e616659fcb51e12e032eb;hb=183bd2b78445842ee859e2f10f8ab9dc84cf2776;hpb=a548ec888564c4aca659f187c41f3f995842a7f6 diff --git a/solid_state_physics/tutorial/2_01s.tex b/solid_state_physics/tutorial/2_01s.tex index a892853..033c8ae 100644 --- a/solid_state_physics/tutorial/2_01s.tex +++ b/solid_state_physics/tutorial/2_01s.tex @@ -62,7 +62,7 @@ \item $I = (\textrm{charge}) \cdot (\textrm{loops per time}) \stackrel{1/T=\omega_L/2\pi}{=} (Ze)(\frac{1}{2\pi}\frac{-e}{2m}B)$\\ - $\mu=IA=I2\pi<\rho^2>=-\frac{Ze^2B}{4m}<\rho^2>$\\ + $\mu=IA=I\pi<\rho^2>=-\frac{Ze^2B}{4m}<\rho^2>$\\ $== \Rightarrow =3=3$\\ $<\rho^2>=+=\frac{2}{3}$\\ $\mu=-\frac{Ze^2B}{6m}$ @@ -92,18 +92,18 @@ \left(0,0,B\right)$\\ Note: $\nabla_r{\bf A}=0$ \item $ - H_{kin}'=\frac{i\hbar e}{2m}\left( + H_{kin}'=\frac{i\hbar e}{2m}\frac{B}{2}\left( x\frac{\partial}{\partial y}-y\frac{\partial}{\partial x} \right)+\frac{e^2B^2}{8m}(x^2+y^2) $\\ $ L_z=x\frac{\partial}{\partial y}-y\frac{\partial}{\partial x} - \Rightarrow H_{kin}'=\frac{i\hbar e}{2m}L_z+ + \Rightarrow H_{kin}'=\frac{i\hbar e}{2m}\frac{B}{2}L_z+ \frac{e^2B^2}{8m}(x^2+y^2) $ \item $\chi=-\frac{1}{V}\mu_0\frac{\partial^2 E}{\partial B^2} \Rightarrow$ - only second term contributes to $\chi$! + only second term contributes to $\chi$!\\ $\chi=-\frac{1}{V}\mu_0\frac{e^2}{4m}<\phi|(x^2+y^2)|\phi>$ \item $<\phi|x^2|\phi>=<\phi|y^2|\phi>=\frac{1}{3}<\phi|r^2|\phi>$\\ $\Rightarrow \chi=-\frac{1}{V}\mu_0\frac{e^2}{6m}