Solid State Lec (1-2-3) PDF

# Solid State (1) - **Crystallography** - Solid - Has a unit cell. - The unit cell is the smallest part in the material. - It has a dimension in (x-y-z) and directions (α-β-γ). - It repeats in long range order with the same dimension and direction. - Breaking symmetry is differe...

# Solid State (1) - **Crystallography** - Solid - Has a unit cell. - The unit cell is the smallest part in the material. - It has a dimension in (x-y-z) and directions (α-β-γ). - It repeats in long range order with the same dimension and direction. - Breaking symmetry is different in the range of order. - The unit cell has full symmetry. ## Types of Materials - **Amorphous**: There isn't long-range order. - **Polycrystalline**: Long-range order is in the train. - **Single crystal**: Long-range order. - The grain if's a single crystal. - The lattice parameters is the dimensions of the crystal. ## This atom is common in - 8 x 1/2 = 1 atom centers ### Na - 15 - 232 - 206351- 23 - Conduction electrons - Localization electrons ## Avogadro's Number Av - 6.023 x 10^23 per mol - “Number of Atoms Per mol” ## Charge 1.6 x 10^-19 - Thermal conductivity - Spin 1/2: Magnetic effect ## Any Particle has the same speed of light or near to it, can omit light. # Solid State I (2) ## Crystal Structure ### The different between Pincel, Carbon Sheet and Diamond is the Atomic Structure ### The carbon is a superconductor material. ## In diles - No. of atom/structure = 1 atom. - B: 1 Body Centered - F: 1/2 Face Centered ### FCC = 4 atoms ### Planes - X:5 - Z: 2 - Y: 1 - Z: 1 - X: 1 - Y: 0 - X:1 - Y: -1 - Z : -1 - Interself - Reverse - The final result ## The existence of electrical conductivity only on one surface. ### (110) - Y: 1 - Z: 1 ### X-ray Diffraction - 1.8426 A ### Bragg's Law - "2 d sinθ = nλ" - n: integer number of λ ### Inter planar distance “Parallel Planes” ### Diagram of peak vs angle - θ=0, 001 - θ=45, 111