Variation of energy bands with alloy composition, Electrical Engineering

Assignment Help:

Variation of Energy Bands with Alloy Composition

The band structures of III-V ternary and quaternary compounds modifies as their composition is varied.
There are 3 valleys in the conduction band: Γ (at k = 0), L, and X.
In GaAs, the Γ valley has the minimum energy (direct with Eg = 1.43 eV) along with very few electrons residing in L and X valleys (apart from for high field excitations).
In AlAs, the X valley has minimum energy (indirect along with Eg = 2.16 eV).

2433_Variation of energy bands with alloy composition.png

Figure: The E-k diagram of (a) GaAs and (b) AlAs, showing the three valleys (L, Γ, and X) in the conduction band.

Related Discussions:- Variation of energy bands with alloy composition

Transistor, what is a transistor?

what is a transistor?

Explain about blocking probabilityand grade of service, Q. Explain about bl...

Q. Explain about blocking probabilityand Grade of service? And what do you mean by delay systems in telecommunication networks? Ans: Grade of service: In loss systems, traff

Show quantization process, Q. Show Quantization process Let Figure (a) ...

Q. Show Quantization process Let Figure (a) illustrate a message f (t) with values between 0 and 7 V. A sequence of exact samples taken at uniform intervals of time is shown: 1

Cpld design project, 1) Study the CPLD Design Project Brief to gain an unde...

1) Study the CPLD Design Project Brief to gain an understanding of the project, and the System Specification, Circuit Description, Pre-processing and Post-processing Requirements f

For zero flag , For zero flag CZ ( Call on Zero ) CNZ ( Call on no...

For zero flag CZ ( Call on Zero ) CNZ ( Call on no zero ) Instructions CZ call the subroutine from the specified memory location if zero flag is set (Z=1). The i

Explain hall effect with hall mobility and hall angle, Explain Hall effect....

Explain Hall effect. Consider a slab of material wherein there is a current density J resulting by an applied electric field Ex in the x- direction. The electrons will drift al

Multiplexed address data bus - pins and signals , Multiplexed Address/ Data...

Multiplexed Address/ Data Bus Pins AD 7 - AD) are used for multiplexed address data bus. This bus is bidirectional input output and serves two purpose. Initially the bus

Give applications of emitter follower, Q. Give applications of emitter foll...

Q. Give applications of emitter follower The emitter follower has the following principal applications: 1. To provide current amplification with no voltage gain 2. Impede

Explain effect of frequency of applied electric field, Explain effect of fr...

Explain effect of frequency of applied electric field. If an external electric field is applied, the distance among charges that is related to chemical bonding keeps constant i

Determine voltage - current and the power, Q. Determine v, i, and the power...

Q. Determine v, i, and the power delivered to elements in the network given in Figure. Check whether conservation of power is satisfied by the circuit.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages