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  1. Heat Capacity
    Rise in internal energy per unit temperature
  2. Amorphous Solid (non-crystalline solid)
    a solid with no order
  3. Crystalline (single crystal)
    order through entire solid
  4. Polycrystalline
    solid segmented in ordered regions - called grains
  5. Grains
    defective regions
  6. Interstitial defect
    atoms that occupy a site in the crystal structure at which there is usually not an atom
  7. Frenkel defect
    a nearby pair of a vacancy and an insterstitial
  8. Shottky defect
    a pair of vacancies
  9. Edge dislocation (line)
    the termination of a plane of atoms in the middle of a crystal
  10. Screw dislocation (line)
    helical path traced around line defect
  11. Thermal activated process
    is one in which the system must overcome an energy barrier in order for the process to go forward
  12. Diffusion
    the passive movement of molecules or particles along a concentration gradient, or from regions of higher to lower concentration
  13. Solid solution
    (of two metals)... one metal is the "host" (and the other the "impurity", then the addition of the "impurity" metal will cause an increase in the resistivity and make the total resistivity less and less temperature dependent.
  14. Isomorphous phase diagram
    a phase diagram for an alloy that has an unlimited solid solubility... //same morphology everywhere
  15. Phase
    a HOMOGENEOUS portion of a chemical system that has the same structure, composition and properties everywhere
  16. Nucleation
    initial crystal formation
  17. Isotherm
    a horizontal line on a phase diagram
  18. Solidus curve
    line separating solid phase from mixed phase
  19. Mean free path
    mean scattering time/relaxation time
  20. Mobility
    expresses how "easy" electrons can move (drift) under the influence of an electric field; it is directly related to relaxation (or mean scattering) time
  21. Conductivity
    the ability of a solid to conduct electricity (cousin of mobility)
  22. Covalent bond
    sharing of electrons... between atoms to complete outer shells
  23. Ionic Bond
    transfer of charge; i.e. electron transfer from one atom to the other creating ions;
  24. Metallic bond
    atoms (of metals) give easily valence electrons to the solid (sharing of "free" electrons)
  25. Diamond lattice
    Si, Ge; Zincblend when two atoms GaAs (two interpenetrating fcc's displaced by ¼ a
  26. Work function
    minimal amount of energy required to remove an electron from a metal to a vacuum
  27. Orbital
    region of a space in an atom or molecule in which an e- with a given energy may be found
  28. Light Intensity
    more light "particles"
  29. Photon
    a light particle//a quantum of energy
  30. Pauli Exclusion Principle
    NO two electrons can have the same set of quantum numbers
  31. Hund's Rule
    All of the electrons in a singly occupied orbitals have to keep their spin parallel//same spin
  32. Diffraction
    the bending of waves due to interaction with objects of size similar to its wavelength
  33. Space Quantization
    the quantization of one or more components of the angular momentum of a system
  34. Energy Quantization
    the concept refers to how electrons can only exist in different energy levels. Their existence in the energy levels defines atoms.
  35. Wavefunction
    probability function that describes a particles wave like behavior
  36. Quantization
    the act of dividing into quanta or expressing in terms of quantum theory
  37. Tunneling
    If an electron comes up a potential barrier greater than its energy... there is a finite probability that it will "pass" through the barrier
  38. Bohr Radius
    the radial distance where the radial probability is maximum
  39. LASER
    light amplification by stimulated emission of radiation
  40. Ground state
    lowest energy/n=1 state
  41. Heisenberg's Uncertainty Principle
    The position and momentum of a particle cannot be simultaneously measured with high precision
  42. Schrodinger Equation
    • describes how the quantum state of some physical system changes with time.
    • ih(part d/part dt)w= Hw
  43. state
    description of a system in terms of parameteres
  44. Density of states
    the number of available electronic states per unit volume per unit energy
  45. Seebeck Effect
    Net diffusion of electrons from the "hot" to the "cold" region of a metal
  46. Effective electron mass (m_o)
    the mass of a particle that it seems to have when responding to forces, or the mass that it seems to have when en masse with other identical particles in a thermal distribution
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2013-12-11 15:36:51

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