Solutions lecture 7

src/7_tight_binding_model_sol.md

@@ -34,13 +34,13 @@ Group velocity is given as $v=\hbar^{-1}\frac{\partial E}{\partial k}$ with $E=\
 3.
 
 ```python
-pyplot.subplot(1,2,1)
-k = np.linspace(-pi/2, pi/2, 300)
-pyplot.plot(k, np.cos(k))
-pyplot.xlabel('$k$'); pyplot.ylabel('$v(k)$')
-pyplot.xticks([-pi/2, 0, pi/2], [r'$-\pi/2$', 0, r'$\pi/2$'])
-pyplot.yticks([0, 1], [0, r'$2\sqrt{\frac{\kappa}{m}}$'])
-pyplot.hlines([1], -pi/2, 0, linestyles='dashed')
+##pyplot.subplot(1,2,1)
+##k = np.linspace(-pi/2, pi/2, 300)
+##pyplot.plot(k, np.cos(k))
+##pyplot.xlabel('$k$'); pyplot.ylabel('$v(k)$')
+##pyplot.xticks([-pi/2, 0, pi/2], [r'$-\pi/2$', 0, r'$\pi/2$'])
+##pyplot.yticks([0, 1], [0, r'$2\sqrt{\frac{\kappa}{m}}$'])
+##pyplot.hlines([1], -pi/2, 0, linestyles='dashed')
 
 pyplot.subplot(1,2,2)
 w = np.linspace(-0.95, 0.95, 300)