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 efficiency of the transformer, Q. These data were obtained from...

Q. These data were obtained from tests carried out on a 10-kVA, 2300:230-V, 60-Hz distribution transformer: • Open-circuit test, with low-voltage winding excited: applied voltag

Harmonics, how harmonics shows effect on power systems?

how harmonics shows effect on power systems?

Refrigeration and airconditioning, Ask question #Minimum 100 words acceptTh...

Ask question #Minimum 100 words acceptThere are various refrigeration systems employing various methods. State any seven (7) refrigeration systems, mention the method(s) employed t

Enhancement operation of p-channel enhancement mosfet, Q. Show the Enhancem...

Q. Show the Enhancement operation of p-channel enhancement mosfet? As the gate terminal is insulated from the channel by the silicon dioxide layer, we can also apply a negative

Calculate the resistance of the coil of a transistor, A 6 V / 2.5 mA relay ...

A 6 V / 2.5 mA relay is connected in the output stage of a transistor.  The coil is made of aluminium having α = 0.004. The resistance of the coil is 600 ? at 32 o C. Calculate th

Why are waveguides not used at low frequencies, Q. Comment brie?y on the fo...

Q. Comment brie?y on the following: (a) Why are waveguides not used at low frequencies? (b) Why are open-wire lines not generally used as guiding structures at very high freq

What is the need of modem in data communication, Q. What is the need of MOD...

Q. What is the need of MODEM in data communication? Need of Modem: Modems are used to interface computers, computer networks in addition to other terminal equipment to teleco

Neural network, solve problem by neural network using matlab code

solve problem by neural network using matlab code

Define asynchronous communication with serial communication, With respect t...

With respect to serial communication define the asynchronous communication. Asynchronous implies "no synchronization", and therefore does not require sending and receiving idl

Magnetic Circuits:, A circular ring of magnetic material has a mean length ...

A circular ring of magnetic material has a mean length of 1m and a cross sectional area of .001m^2.A sawcut of 5mm width is made in the ring . calculate the magnetizing current req

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