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

Define flash analog to digital converters, Define Flash Analog to Digital C...

Define Flash Analog to Digital Converters? Parallel flash ADCs transform the analog input voltage faster as compared to other types of ADCs.  They compare the voltage in parall

Show the subtraction method, Q. Show the Subtraction Method? For this p...

Q. Show the Subtraction Method? For this procedure (method), start with a weighted position value greater that the number. If the number is greater than the weighted position f

Hysteresis results in a dissipation of energy, Hysteresis results in a diss...

Hysteresis results in a dissipation of energy Hysteresis results in a dissipation of energy which appears as a heating of the magnetic material. The energy loss associated wit

Digital switching switching in telecommunication, Name the switching scheme...

Name the switching schemes used in a digital exchange

Find the equivalent components of the network, Q. At the two terminals (A, ...

Q. At the two terminals (A, B) of a one-port network, the voltage and the current are given to be v(t) =200 √2 cos (377t + 60°) V and i(t) = 10√2 cos(377t + 30°) A. (a) Determin

Find the frequency at which the forced response is zero, Q. The response y(...

Q. The response y(t) of a linear system to a unit-step excitation is y(t) = (4 - 10e -t + 8e -2t )u(t). (a) Find the system function. (b) Find the frequency at which the fo

Clampers.., plz give ans about signs of capicitor, and give detail about cl...

plz give ans about signs of capicitor, and give detail about clampers.

Block schematic diagram of ss7, Q. Block schematic diagram of SS7? Leve...

Q. Block schematic diagram of SS7? Levels are as below: Level 1: The Physical Layer Level 2: The Data Link Level Level 3: The signaling network level Level 4: The User Pa

Program counter , Program Counter (PC) It is a   16 bit  register.  It ...

Program Counter (PC) It is a   16 bit  register.  It is a memory  pointer. It stores  the memory address  of the next  byte of the program to be executed. Memory  address is of

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