ECE474S11_Lec02_12Jan11

ECE474S11_Lec02_12Jan11 - ECE 474: Principles of Electronic...

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ECE 474: Principles of Electronic Devices Prof. Virginia Ayres Michigan State University ayresv@msu.edu
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V.M. Ayres, ECE474, Spring 2011 Lecture 02: Chapter 01 How to quantify physical structures of crystal systems that are important for devices: ± Cubic systems: bcc, fcc, diamond, zinc-blende ² Number of atoms in unit cell ² Lattice constant a ² Packing fraction ² Nearest neighbor distances ² Density Examples of each
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V.M. Ayres, ECE474, Spring 2011 . The Nobel Prize in Physics 2010 Graphene Carbon nanotubes Why quantify: ± The physical structure is the environment through which current travels in a device ± The current interacts seriously with its environment
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V.M. Ayres, ECE474, Spring 2011 . The Nobel Prize in Physics 2010 Graphene Carbon nanotubes Cubic systems: basic repeat pattern can be described within an imaginary cube of side a. Side a (in nm) is called the “lattice constant”. a
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V.M. Ayres, ECE474, Spring 2011 . The Nobel Prize in Physics 2010 Graphene Carbon nanotubes Cubic systems: 3 3 3 3 3
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. The Nobel Prize in Physics 2010 Graphene Carbon nanotubes Cubic systems: traditional semiconductors and many metals. 3
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ECE474S11_Lec02_12Jan11 - ECE 474: Principles of Electronic...

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