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

Compute the area of each plate, Q For a parallel-plate capacitor with plate...

Q For a parallel-plate capacitor with plates of area A m 2 and separation d m in air, the capacitance in farads may be computed from the approximate relation Compute the a

Resetin input - externally initiated signals , RESETIN  Input It is a...

RESETIN  Input It is an  active  low signal when  it goes low program counter is  reset to zero and busses are tri stated  it also reset interrupt enable flip flop  and instruc

Describe the methods of improving commutation., There are two practical way...

There are two practical ways of improving commutation i.e. of making current reversal in the short - circuited coil as sparkless as possible. These methods are known as (i) resista

Ampere''s law, This is at the heart of the analysis of electromagnetics. It...

This is at the heart of the analysis of electromagnetics. It is based on a series of experiments conducted by the French scientist Ampere (1775 - 1836), in which the force between

Define transconductance, Q. Define Transconductance? The control that t...

Q. Define Transconductance? The control that the gate voltage has over the drain current is measured by the transconductance gfs and is similar to the transconductance  gm of t

Consumer interaction and service standards, Consumer Interaction and Servic...

Consumer Interaction and Service Standards These KPIs deal along with the customer, internal business procedures and change management. These are significant to give the desir

Node-voltage method to find the current, Q. Use the node-voltage method to ...

Q. Use the node-voltage method to find the current I through the 5- resistor of the circuit of Figure.

Explain the applications of emitter follower, Q. Explain the applications o...

Q. Explain the applications of emitter follower. Because of high input impedance and low output impedance an emitter follower is capable of transferring maximum power from the

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