Bonding forces and energy bands in solids, Electrical Engineering

Bonding Forces and Energy Bands in Solids

  • Electrons are controlled to sets of discrete energy levels in atoms, with large gaps among them in which no energy state is obtainable for the electron to occupy.
  • Electrons in solids as well are restricted to certain energies and are not permitted at other energies.
  • Variation → in the solid, the electron has a range (or band) of available energies.
  • The discrete energy levels of the isolated atom spread into bands of energies in the solid since
  1. In the solid, the wave functions of electrons in neighboring atoms overlap, so it influences the potential energy term and the boundary conditions in the Schrödinger equation, and different energies are acquired in the solution, and
  2. An electron is not essentially localized at a specific atom.
  • The affect of neighboring atoms on the energy levels of a specific atom can be treated as a small perturbation, giving rise to shifting and splitting of energy states into energy bands.
Posted Date: 1/11/2013 2:52:06 AM | Location : United States







Related Discussions:- Bonding forces and energy bands in solids, Assignment Help, Ask Question on Bonding forces and energy bands in solids, Get Answer, Expert's Help, Bonding forces and energy bands in solids Discussions

Write discussion on Bonding forces and energy bands in solids
Your posts are moderated
Related Questions
Q. How does one arrive at the probability of availability of free lines during busy hour? How can this be improved? Ans: One can arrive at probability of free lines during busy

Q. Discuss the disadvantages of an RC coupled amplifier? RC coupled amplifiers have a few disadvantages. The resistors use dc power and so the amplifier has low efficiency. The

Q. Sketch the idealized (asymptotic) Bode plot for the transfer function Find the angular frequency at which H(ω) is 0dB and the angular frequency at which θ(ω) = -60°.

the relation between power

Consider a simple zener voltage regulator with the circuit diagram shown in Figure (a). (a) For a small reverse resistance R Z S and V S - R S i out > V Z , show that v ou

Q. What the voltage gains in the FET amplifier? For common source  Voltage gain=V o /V i = - µRd / Rd + rd where µ is the amplification factor,Rd the drain resistance a

Q. Consider the three BCD numbers listed below. 0001 1000 0101 1000 0010 0001 0011 1000 0100 0011 0101 0101 a) Convert these numbers to their decimal values. b) Conv

Give the properties and application of PVC. Polyvinylchloride (PVC):  It is replacing rubber to a great extent in veracious applications. There is PVC insulated (non-sheathed)

Its not essential that a power plant uses only two rectifiers, it depends on the load there at the site and the capacity of the rectifier or SMPS. Assume the load at the site is 12

Q. A 230-Vdc shuntmotor delivers 30 hp at the shaft at 1120 r/min. If the motor has an efficiency of 87% at this load, find: (a) The total input power. (b) The line current.