MY-ASSIGNMENTEXPERT™可以为您提供handbook PHYS3118 Solid Physics固体物理课程的代写代考和辅导服务！
这是新南威爾斯大學固体物理课程的代写成功案例。
PHYS3118课程简介
Solid State Physics provides the basis for the most important technological advances of the 20th century. It also provides a wide range of opportunities to “see” the effects of Quantum Physics in action. Specific topics include: Types of solids, crystal structures, reciprocal lattices, lattice vibrations (phonons), x-ray and neutron diffraction for structural analysis, thermal properties of solids, Bloch’s theorem and the nearly free electron model, Band structure, non-conventional crystals (e.g., molecular crystals, quasicrystals), semiconductors, doping, p-n junctions and diodes, light emitting diodes and photovoltaics, excitons and electron-photon interactions, electron-defect and hyperfine interactions, electron-phonon interactions, superconductivity, Josephson effect, SQUIDs, dielectrics, ferroelectrics, magnetism and magnetic materials, spin interactions, phase transitions in solids, magnetic devices, exotic ordered materials (e.g. multiferroics), finite solids and surface effects, Schottky barriers, MOSFETs, fabrication of solid state devices, devices in the nanoscale limit.
Prerequisites
Solid-state physics is the study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics. Solid-state physics studies how the large-scale properties of solid materials result from their atomic-scale properties. Thus, solid-state physics forms a theoretical basis of materials science. It also has direct applications, for example in the technology of transistors and semiconductors.
PHYS3118 Solid Physics HELP（EXAM HELP， ONLINE TUTOR）
Problem 1
Consider successively the direct (cubic) simple cubic, body-centered cubic, and face-centered cubic lattices, each with lattice parameter $a$ and their associated reciprocal lattices. In reciprocal space, find the corresponding volume of the primitive lattice (order 1).
Problem 2
A beam of monochromatic X-rays with wavelength $\lambda$ propagates in a vacuum and encounters a spherical atom of radius $R$. The incident wave with wave vector $\mathrm{k}_0=(2 \pi / \lambda) \mathrm{u}_0$ is partially diffused by the $\mathrm{Z}$ electrons of the atom, assumed to have a density distribution of $\rho$.
(a) Find the amplitude of a wave diffused in the direction u0 by the electrons contained in the volume $\mathrm{dV}$ described by the radius vector $\mathrm{r}$ (with respect to the wave diffused by a point electron placed at the center 0 of the atom)
In the form of an integral, deduce the expression for the form factor of an electron distribution with spherical symmetry.
(b) Find the atomic diffusion coefficient of a uniform electron distribution at the interior of a sphere of radius $\mathrm{R}$. These results should be expressed as a function of $\mathrm{k}=\mathrm{k}-\mathrm{k}_0$ where $\mathrm{k}_0=(2 \pi / \lambda) \mathrm{u}_0$ and then, state the result in terms of the parameters $\sin \theta / \lambda$ which are more directly related to experiments.
Problem 3 (Bonus)
The figure bellows adapted from a Neuton diffraction pattern of diamond(fcc lattice with $2 \mathrm{C}$ atoms at 000 and $1 / 4 \quad 1 / 4 \quad 1 / 4$; lattice $a=3.56 \AA$ ). Corrected from some experimental factors such as the temperature effects, this figure represents the angular variation of the scattered intensities, by postulating that they are uniquely proportional to the square of the structure factor $\mathrm{F}(\mathrm{h}, \mathrm{k}, \mathrm{l})$.
(a) Give the indices of the three reflections shown in the figure.
(b) Explain why they have unequal weight.
(c) Deduce the associated wavelength $\lambda$ and the kinetic energy, $\mathrm{E}_{\mathrm{k}}$ (in $\mathrm{eV}$ ) of incident neutrons.
Problem 4
(a) Consider a dielectric crystal made up of layers of atoms, with rigid coupling between layers so that the motion of the atoms is restricted to the plane of the layer. Show that the phonon heat capacity in the Debye approximation in the low temperature limit is proportional to $T^2$.
(b) Suppose instead, as in many layer structures, that adjacent layers are very weakly bound to each other. What form would you expect the phonon heat capacity to approach at extremely low temperatures?
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