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

Capacitor-start-capacitor-run single-phase motor, Capacitor-start-capacitor...

Capacitor-start-capacitor-run single-phase motor : In this case, two capacitors are used one for preliminary and other for running purpose as shown. The capacitor used for prelimin

What is meant by the sensitivity of a potentiometer, What is meant by the s...

What is meant by the sensitivity of a potentiometer? A battery E 1 of 4 V and a variable resistance R h are linked in series with the wire AB of the potentiometer. The length

Define perfectly plastic body , An object which does not get its actual con...

An object which does not get its actual configuration at all on the removal of deforming force, though short the deforming force can be is a perfectly plastic body.

Define rms value of ac, Q. Define: rms value of AC. RMS value of a.c...

Q. Define: rms value of AC. RMS value of a.c. The rms value of alternating current is described as that value of the steady current which when passed through a resisto

Temporal coharence, tell me about the terms of temporal coharence

tell me about the terms of temporal coharence

Lumen, lumen; lm: The derived SI unit of luminous flux, described as t...

lumen; lm: The derived SI unit of luminous flux, described as the luminous flux emitted through a uniform point source of 1 cd emitting its luminous energy on a solid angle of

Cosmological redshift, Cosmological redshift An effect where light emit...

Cosmological redshift An effect where light emitted through a distant source seems redshifted due to the expansion of spacetime itself.

Dielectric, what is electronic polarization?

what is electronic polarization?

Collision, The collision between two bodies be elastic if bodies are?

The collision between two bodies be elastic if bodies are?

ASSIGNMENT, VRIFY THE CURRENT DIVIDER RELATION AND VOLTAGES DIVIDER RELATIO...

VRIFY THE CURRENT DIVIDER RELATION AND VOLTAGES DIVIDER RELATION

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