bandstructure_supplemental

bandstructure_supplemental - 1 ¸ª 8 AE ª Semiconductor...

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Unformatted text preview: 1 ¸ª : 8 AE ª Semiconductor Physics and Devices Basic Principles Third Edition Donald A. Neamen Chapter 3 Bandstructure a Prepared by Prof. Jung Jongwan 2010 -1 0 2 i ¸ª : x ¬ ª Bandstructure ˆ Preview • Band structure G 1 S4 à review r . • Reciprocal lattice r : (1) real lattice r Fourier transform r . (2) real lattice S4 G wave vector v . • BZ (Brillouin zone) : reciprocal lattice r Wigner-Seitz primitive cell. • Brillioun zone : ^ Brillouin zone wave r Bragg I (diffraction) G . • 1 r B.Z G BZ diffraction G . ( r , r S ) • Brillouin zone S4 , ¬ G , bonding/debonding r . . Ë S k ^ ¸ * Ü μ * S + C S . 3 ¸ª : x AE ª Bandstructure H Preview • N r primitive cell brillouin zone S €Ü ¸ k AE¸ 2N(spin N G . Spin N), X r 2N . • primitive cell S4 : r . • primitive cell S4 : X v . r overlap N G , / . • Diamond, Si, Ge N 4 ª /2 r atom, primitive cell r 8 N G v . 4 ¸ª : Ø » ª Lattice 5 h ¸ª : 8 Ó ª Wigner-Seitz primitive cell Wigner-Seitz primitive cell: - Primitive cell r unit cell 4 .- Primitive cell S4 c G ....
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bandstructure_supplemental - 1 ¸ª 8 AE ª Semiconductor...

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