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1 repeat for a square lattice the sketch of the first four brillouin zones for a rectangular lattice figure 2102 the
1 the current and charge densities derived in section 14 are guaranteed to conserve charge provided that vx t is real
1 consider the dispersion relation 194 which is used to model non-parabolicity in the conduction band of gaas estimate
calculate the probability of finding an electron in the lowest bound state inside the 4 nm well using equation 421 this
1 the emitter efficiency of a bipolar junction transistor is governed by the ratio of current densities carried across
interesting results can be achieved with type ii staggered hetero junctions figure 35 sketch the bands for both p-n and
plot a minimum of 100 points along the t 500 r isotherm on p-v coordinates for methane usinga the ideal gas equation
1 estimate the degree of contamination in the grown material simply as2 verify that the mean free path l is much
the diatomic chain whose vibrations were considered in section 283 had identical springs but different masses a model
suppose that an electric field is applied at 45deg to the x -direction of the 100- valley in the conduction band of si
1 confirm that the first brillouin zone of a face-centred cubic crystal contains one state per spin per atom of the
if the amount of helium produced by the large-scale liquefaction of air is 130 lbm per 100 tons of air determine the
1 estimate the width of the lowest peak in the example of resonant tunnelling plotted in figure 511 using the attempt
consider a well of width a 10 nm confined between barriers of thickness b 3 nm and height v0 03 ev the energy epk of
rewrite equation 568 for the conductance of a barrier in three dimensions with the angle of the electrons measured from
1 how are t and r changed when a barrier is translated through d as in the previous exercise and has this any
a monolayer of in as between gaas can be modelled very roughly as a potential well for electrons of depth 1 ev and
calculate the density of states for electrons trapped in an infinitely deep two-dimensional 11 x 9 nm well the energies
1 how many electrons can be trapped at the heterojunction described by the triangular potential in the earlier problem
calculate ne for an infinitely deep well of width a and compare it with the results for free three-dimensional
use the uncertainty relation equation 163 to estimate the zero-point energy in a parabolic well if the spread of the
the department of homeland security discovered that 100 kg of nitrogen n2 was mixed with 382 kg of a possibly toxic
estimate the spacing of the energy levels for electrons and holes both light and heavy and the optical transition
onboard a starship a demented alien creature releases a mixture of ideal gases made up of 400 lbm of molecular oxygen
1 we shall see in chapter 6 that a magnetic field b gives rise to a parabolic2 what are the energies of the bound