Unformatted text preview: has a dispersion relation E ( k ) = + 2 t cos ka where -π < ka < + (1) Do the same problem using a unit cell of two atoms (instead of one) and show that E ( k ) = ± 2 t cos ka where -/2 < ka < + /2 (2) Are (1) and (2) equivalent? Explain. Problem 2: Exercise E.6.5, Page 154 Problem 3: Consider a uniform one dimensional wire with periodic boundary conditions having an E(k) relationship E = Bk 4 . Find the density of states as a function of energy....
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- Fall '10
- Fundamental physics concepts, Nanoelectronics