L02-Solid_State_Physics

L02-Solid_State_Physics - Solid State Physics Structure of...

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Solid State Physics
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Structure of Matter Macroscopic Matter Molecules (~10 23 cm -3 ) Atoms Electrons, protons, neutrons Quarks
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States of Matter Solid Have definite shape, volume, strong interaction Liquid Shapeless, intermediate interaction Gas Free atoms or molecules, weak interaction Plasma A collection of free, charged particles
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Arrangement of Atoms in Solids Crystalline A regular arrangement of atoms with long- range order Polycrystalline Short range order but no long range order Amorphous Random arrangement of atoms
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Crystalline Solids by Bond Types Atomic crystals Noble gases (He, Ne, Ar) Chemically inert, soft, low melting point, poor thermal and electrical conduction Molecular crystals Many polymers, molecular gases Somewhat soft, moderate melting point, poor thermal and electrical conduction Ionic crystals Crystal sites are occupied by positive and negative charged ions Coulombic interactions dominate Hard, high melting temperatures, poor thermal and electrical conduction Metallic crystals Soft to hard, high melting temperatures, excellent thermal and electrical conductors Covalent crystals Strong bonding Hard, high melting temperatures, poor thermal and electrical conductors
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Crystal Lattices A unit cell is the smallest arrangement of atoms that has all the information necessary to build the lattice.
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L02-Solid_State_Physics - Solid State Physics Structure of...

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