The nearly-free electron model, Physics

Assignment Help:

Consider an electron in a simple one-dimensional periodic potential. The energy of the electron will vary periodically due to the influence of the periodic potential, and can be described by an energy-wavevector relation:
E(k)=-Acos(ka)
where a is the lattice constant and k is the Bloch wavevector.
a) Obtain an expression for the velocity of a wavepacket as a function of k

Related Discussions:- The nearly-free electron model

How can lenz law explain law of conservation of energy??, Lenz''s Law state...

Lenz''s Law states that the Nature of induced emf in the coil is such that it opposes the causes of it. It can be explained by a simple understanding of Faraday EM induction exper

Electrostatic shielding, experiment to explain electrostatic shielding

experiment to explain electrostatic shielding

Evaluate the diameter of dark ring, In a Newton's ring experiment with air ...

In a Newton's ring experiment with air film the diameter of nth and (n - 5)th dark rings are 12.2 mm and 8.1 mm respectively. Evaluate the diameter of (n + 5)th dark ring

What are solid core or multicore, What are Solid core or multicore? It ...

What are Solid core or multicore? It will depend on the use to that the optic is put and the actual installation conditions. Solid core optics has usually, a larger bending rad

Physics project of12, to demonstrate the electrostatic shielding

to demonstrate the electrostatic shielding

Evaluate the final temperature of the drink, (a) Two55 g ice cubes are drop...

(a) Two55 g ice cubes are dropped into300 g of water in a thermally insulated container. If the water was initially at 25°C, and the ice came directly from a freezer at -15°C, what

Write down the relation between focal length and power, Write down the rela...

Write down the relation between focal length and power of a lens. Write down the expression for the equivalent focal length of two thin lenses separated by a distance.

Coupling factor, Coupling factor: If all the flux of a primary coil lin...

Coupling factor: If all the flux of a primary coil links with all the turns of a secondary then 100% coupling exists. Sometimes it is more convenient to use a coupling factor

Additive nature of charge, An object contains n1 protons and n2 electrons.w...

An object contains n1 protons and n2 electrons.what is net charge on the object?

Work and energy, calculate the work required to be done to stop a car of 15...

calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?

Write Your Message!

Name

Email id

Message

Verfication Code

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!

Submit Assignment

User Account

All Pages