QuestionQuestion

Transcribed TextTranscribed Text

1. A certain semiconductor (m' - 0.12 me, mn - m,) is doped with acceptor impurities of density N° - 10-23 m at the level EA - Eg 2. At the temperatures of interest Eg - 20kT and E, - SkT. 5 Determine (a) the density of ionized impurities (b) the electron density; (c) the hole density; (d) the temperature; (e) the energy gap. 2. A system of electron spins is placed in a magnetic field of 2 Tesla. The number of spins parallel to the magnetic field is twice as large as the number of anti parallel spins. Determine the temperature of the system. 3. A rectangular quantum wire with cross section 15 x 15 is realized in GaAs. (a) Write an expression for the subband threshold energies of the quantum wire. (b) Write a general expression for the electron dispersion in the quantum wire. (c) In a table, list the quantized energies and their degeneracies (neglecting spin) for the first 15 energetically-distinct subbands. (d) Plot the density of states of the wire over an energy range that includes the first fifteen subband energies. 4. For this same wire: (a) Write an expression for the electron density (per unit length) as a function of the Fermi energy of the wire. (b) Plot the variation of the electron density as a function of energy for a range that corresponds to filling the first five distinct energy levels, taking proper account of level degeneracies.

Solution PreviewSolution Preview

This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.

Semiconductors Questions
    $33.00 for this solution

    PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

    Find A Tutor

    View available Semiconductor Physics Tutors

    Get College Homework Help.

    Are you sure you don't want to upload any files?

    Fast tutor response requires as much info as possible.

    Decision:
    Upload a file
    Continue without uploading

    SUBMIT YOUR HOMEWORK
    We couldn't find that subject.
    Please select the best match from the list below.

    We'll send you an email right away. If it's not in your inbox, check your spam folder.

    • 1
    • 2
    • 3
    Live Chats