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

Plc - programmable logical controller , PLC ( Programmable Logical  Contr...

PLC ( Programmable Logical  Controller ) PLC  stand for programmable logical  controller.  PLC   is an  industrial computer  used to monitor inputs and depending upon  their  m

Telecommunication principles, Draw the block diagram of TDM-PCM system. Exp...

Draw the block diagram of TDM-PCM system. Explain each block. Calculate the bit rate at the output of this system

Explain about zener diodes, Q. Explain about Zener Diodes? Most diodes ...

Q. Explain about Zener Diodes? Most diodes are not intended to be operated in the reverse breakdown region. Diodes designed expressly to operate in the breakdown region are cal

Electrical distribution system, 1. Name the three parts of a programmable l...

1. Name the three parts of a programmable logic controller (PLC) and explain why the PLC is preferred by designers over electromechanical relays. 2. Medium-voltage circuit break

Digital versions of band-pass filter, A case study is required for developm...

A case study is required for development of different digital versions of band-pass filter corresponding to its analogue prototype described by the following normalised transfer fu

Calculate the voltage rating and magnetizing current, 1. For the flyback co...

1. For the flyback converter operating in the discontinuous "current" (flux) mode, derive an expression for the time at which the magnetizing current returns to zero. 2. A forwa

Calculate the starting torque, A squirrel-cage inductionmotor operates at a...

A squirrel-cage inductionmotor operates at a slip of 0.05 at full load. The rotor current at starting is five times the rotor current at full load. Neglecting stator resistance and

Develop an analog computer simulation diagram, Q. Develop an analog compute...

Q. Develop an analog computer simulation diagram to solve the differential equation with y(0) = 2 and ? y(0) = 0.

Choose compensating components for the circuit, Q. Figure gives the frequen...

Q. Figure gives the frequency-response graphs for a 709 op amp. Choose compensating components for the circuit to have a gain of 100 and a frequency response of up to 100 kHz.

Calculate the reflection of wedge, The corners of wedge-shaped block are A(...

The corners of wedge-shaped block are A(0,0,2), B(0,0,3), C(0,2,3), D(0,2,2), E(-1,2,2) and F(-1,2,3) and the reflection plane goes the Y-axis at 450 between (-X) & (Z) axis. Calcu

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