Mark Lundstrom
9/27/13
SOLUTIONS: ECE 656 Homework (Week 6)
Mark Lundstrom
Purdue University
1) In Lecture 14, we discussed M(E) for a 3D semiconductor with parabolic energy bands.
Answer the following two
Quiz Answers: Week 3
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
Lecture 6 Quiz :
1) Which of the following is true ionized impurity scattering?
a) It i
Quiz Answers: Week 1
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
Lecture 2 Quiz :
1) Which bandstructure below best describes graphene?
*
a) E = EC + 2 k 2 2 mn
Mark Lundstrom
8/24/2013
SOLUTIONS: ECE 656 Homework 2 (Week 2)
Mark Lundstrom
Purdue University
1)
Assume T = 0K and work out the electron density per unit area for two cases:
i)
A 2D semiconductor wit
Mark Lundstrom
8/24/2013
SOLUTIONS: ECE 656 Homework 1: Week 1
Mark Lundstrom
Purdue University
1) Working out Fermi-
Dirac integrals just takes some practice. For practice, work out the
integral
M ( E
Quiz Answers: Week 10
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
(Revised 10/30/13)
Lecture 23 Quiz :
d k
1) The equation of motion for an electron in k-
space is
Quiz Answers: Week 11
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
Lecture 26 Quiz :
1) When we write the collision integral like this:
Cf ( r , p, t ) = S ( p p )
Quiz Answers: Week 13
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
(Revised 11/6/13)
Lecture 31 Quiz :
1) In this lecture, we wrote the general balance equation for
Quiz Answers: Week 12
ECE 656: Electronic Conduction In Semiconductors
Mark Lundstrom
Purdue University, Fall 2013
Lecture 29 Quiz :
1) What is the major problem with a 2probe (as opposed to 4probe) measurement
Mark Lundstrom
10/27/13
SOLUTIONS: ECE 656 Homework (Weeks 1011)
Mark Lundstrom
Purdue University
1) Consider a semiconductor with a slowly varying effective mass, m*(x). Following the
procedure in Lecture
Mark Lundstrom
SOLUTIONS: ECE 656 Homework (Week 13)
Mark Lundstrom
Purdue University
(Revised 11/20/13)
1) Repeat the derivation of the current equation presented in L31 (L28 of Fall 2009), but
this time, d
Mark Lundstrom
SOLUTIONS: ECE 656 Homework (Week 12)
Mark Lundstrom
Purdue University
1)
10/30/13
Show that the following relation (eqn. (4.119) in Fundamentals of Carrier Transport) is
true:
e
!
"
R
# S MN
Mark Lundstrom
10/19/13
SOLUTIONS: ECE 656 Homework (Week 9)
Mark Lundstrom
Purdue University
1) It is sometimes said that Ficks Law of diffusion, J = D dn dx , only applies when the
region of interest is many
Mark Lundstrom
10/5/13
SOLUTIONS: ECE 656 Homework (Week 7)
Mark Lundstrom
Purdue University
(Revised 10/30/13)
1) In Lecture 15, we derived a current equation for a 2D, n-
type conductor and wrote it as
J
Mark Lundstrom
ECE 656 Homework (Weeks 15-16)
Mark Lundstrom
Purdue University
(Revised 11/28/13)
1) Monte Carlo simulations of high-field transport in bulk silicon with an electric field of
100,000 V/cm show t