Effective mass, Electrical Engineering

Assignment Help:

Effective Mass

  • The electrons' "wave-particle" motion in a lattice is not the same as that for a free electron, because of the interaction with the periodic potential of the lattice.
  • To still be able to treat these particles as "free", the rest mass has to be altered to take into account the influence of the lattice.
  • The calculation of effective mass takes into account the shape of the energy bands in three-dimensional (3D) k-space, taking appropriate averages over the various energy bands.
  • The effective mass of an electron in a band with a given (E,k) relation is given by

 

                               Mx = [h/(2π)]2 / d2E/dk2         


Related Discussions:- Effective mass

Explain fundamentals of load flow analysis, Explain Fundamentals of Load Fl...

Explain Fundamentals of Load Flow Analysis The calculation of electrical power system load flow or current flow is a problem which has no direct solution. It is not that a solu

Calculate minimum number of poles for the induction machine, A wound-rotor ...

A wound-rotor induction machine, driven by a dc motor whose speed can be controlled, is operated as a frequency changer. The three-phase stator winding of the induction machine is

Dc motor, write the working and construction of dc motor.

write the working and construction of dc motor.

Waveguides, Why are waveguides not used at low frequencies?

Why are waveguides not used at low frequencies?

Transistor, what part the transistor plays in the circuit

what part the transistor plays in the circuit

Instability problem, We would like you to do an indepth study/research in t...

We would like you to do an indepth study/research in the tradeoff between the filtering of the QR and the QR performance So it will be about filtering but more of an indepth for

Dsp causal LTI system, cosider a causal LTI system whose system function is...

cosider a causal LTI system whose system function is H(z)=1-1/5z^-1/(1-1/2z^-1+1/3z^-2)(1+1/4z^-1) find the direct form 1 and direct form 2

Machine-tool process to drill or punch holes, Q. Explain Machine-tool proce...

Q. Explain Machine-tool process to drill or punch holes? Figure depicts an elementary system, including the input, digital processor, drill-positioning mechanism, and sampled-d

Calculate the dc voltage appearing across the brushes, The armature of a fo...

The armature of a four-pole dcmachine has a simplex lap wound commutator winding (which has the number of parallel paths equal to the number of poles) with 120 two-turn coils. If t

MECHANICAL SCIENCE, 0PERATION OF POWER TRANSMISSION (SPEED GOVERNORS)

0PERATION OF POWER TRANSMISSION (SPEED GOVERNORS)

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd