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

Evaluate complex power in power system, Q. Evaluate complex power in power ...

Q. Evaluate complex power in power system? The complex power ¯S in a single-phase systemis the complex sum of the real (P) and reactive (Q) power, expressed as follows:

Design a pulse generator, To design a VI that can also be used as a Sub VI ...

To design a VI that can also be used as a Sub VI in another VI. The title of the VI will be Pulse Generator. The output from the VI will be of the type Analogue Waveform and

What are the functions of bus interface unit in 8086, What are the function...

What are the functions of bus interface unit (BIU) in 8086? (a) Get instructions from memory. (b) Get data from memory and I/O ports. (c) Write data to memory and I/O por

Mov - move instruction, MOV ( Move ) Instruction It copies  the content...

MOV ( Move ) Instruction It copies  the contents of the sources register into destination register. The general format is . This  instruction  is used  to copy 8 bit  from s

What do you mean by conductors and insulators, Q. What do you mean by Condu...

Q. What do you mean by Conductors and Insulators? In order to put charge in motion so that it becomes an electric current, one must provide a path through which it can flow eas

For parity flag - return instructions , For Parity Flag PRE ( Return ...

For Parity Flag PRE ( Return on Parity Even)  and RPO ( Return on Parity Odd) Instructions RPE returns from the  subroutine to the  calling  program if parity flag is not s

Pnp bipolar junction transistor, PNP The other kind of BJT is the PNP ...

PNP The other kind of BJT is the PNP with the letters "P" and "N" standing for the majority charge carriers inside the dissimilar regions of the transistor. Figure:

Clampers, what would the change after adding a registor paralelly in clampe...

what would the change after adding a registor paralelly in clampers?

What are transmission bridges, Q. What are transmission bridges? How do the...

Q. What are transmission bridges? How do they assist in satisfying the connectivity?  Ans: A typical transmission bridge is demonstrated in figure. Series capacitance and shunt

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