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

Regions of operation in bjt, Q. Regions of operation in BJT ? Transisto...

Q. Regions of operation in BJT ? Transistor find many applications like amplifier, switch etc. depending upon the polarity and the magnitude of the applied voltages across the

Capacitor-input filter, Capacitor-input filter: The capacitor-input fi...

Capacitor-input filter: The capacitor-input filter, as well called pi filter because of its shape which looks like the Greek letter pi, is a sort of electronic filter. Filter

Lki load register pair immediate instruction , LKI  Load Register pair  ...

LKI  Load Register pair  Immediate  Instruction This instruction is used to copy or  load  16 bit  data specified  in the  instruction  directly into  the register pair. The i

Fourier deconstruction, Find the Fourier series as far as the third harmoni...

Find the Fourier series as far as the third harmonic, to represent the periodic function y, given by the values in the following table. x 0 o 30

Formulate the s-domain nodal equations, Consider the circuit shown in Figur...

Consider the circuit shown in Figure in the t -domain as well as in the s-domain. Formulate the s-domain nodal equations and use MATLAB to solve for V A (s) and V B (s).

Design a circuit for indicate the connection of a battery, You are asked to...

You are asked to design a circuit that indicates if a 12 V battery has been connected the correct way around to two terminals, A and B. To do this, you have chosen to use a special

For carry flag - return instructions , For Carry Flag  RC (Return of ...

For Carry Flag  RC (Return of Carry) and RNC ( Return on no Carry) Instruction RC returns from  the subroutine  to the calling  program if carry  flag is et (CY= 1). The

Third generation 1964 -1982 - history of computer , Third Generation ( 196...

Third Generation ( 1964- 1982 ) Invention of  technology  of integrated circuits created computers  of third  generation. In  several  logical  gates  are fabricated on a singl

Infrasound waves or microwaves, When recording infrasound waves or microwav...

When recording infrasound waves or microwaves how do they vary from one another? Ans) By microwaves, do you mean "radio signals", like in a microwave oven? These have nothing t

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