Solid state physics Definition and 268 Threads

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

Copyright strictly reserved to Prof. Amal Kumar Das and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105099/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105099

I've learned that in a crystal, the crystal momentum is conserved. When one considers the electrons as Bloch waves, they have a momentum that doesn't commute with the Hamiltonian and they have well definite energies, hence they cannot have a well definite momentum, because there is no basis in...

Hello! I want to know how does a parity transformation affect Bloch states! I always knew that parity takes the position vector to minus itself (in odd number of dimensions), but I have read that it also takes the Bloch wave vector to minus itself but I have not found a satisfactory proof of...

Hello Can somebody explain for me what is the meaning of inversion symmetry in solids? and why does it breaks at the surface? and also why this inversion symmetry breaking leads to SOC(spin orbit coupling)? If somebody also know a document that explain this in full details(from A to Z) please...

Hello people, I have 3 questions related to the mean speed of electrons in a period potential /lattice. I've read Ashcroft and Mermin's page 139 as well as the Apendix E. From what I understood, if one applies the momentum operator on the wavefunction of a Bloch electron, one doesn't get a...

Homework Statement Low-energy electron diffraction (LEED) experiments are carried on to study a deposition of argon (Ar) and xenon (Xe) on the surface of a graphite single crystal. In the regime of vapor pressure considered, 75% of Ar and 25% of Xe are adsorbed on the (hexagonal) crystalline...

What is the value of optical effective electron mass for tin metal (white tin)? What is the value of mean free path for electron of tin metal? At least give me some websites or papers where I can find it?

Homework Statement So I'm doing an experiment at uni which I have to find out the specific heat capacity of given small solid cylinder. We are given an insulated canister(a dewar flask) standing on a scale where we have to pour Liquid Nitrogen(hereafter will be referred as LN2) in. A cork with...

Homework Statement When calculating the Fourier coefficients of the potential of the following lattice (the potential is a sum of deltas at the atom sites): I get the wrong coefficients if I choose the following primitve cell, with primitve vectors a1,a2: And the right coefficients if I...

In the "Introduction to Solid State Physics" by C. Kittel, there is a long wavelength limit in chapter 4 -Phonons I. When Ka << 1 we can expand cos Ka ≡ 1 - ½ (Ka)2 the dispersion relation will become ω2 = (C/M) K2 a2 Does anyone know what frequencies can allow this long wavelength limit to hold?

Hi! So I just breezed through a summer Calc II course (took E&M and Modern Physics last semester) and will be approaching Solid State Physics and Calc III this coming semester together. I've taken my school's upper division Linear Algebra course and passed before last semester and continue to do...

Actually those to subjects are in our syllabus now! Please suggest me some books which will be easy to understand and somewhere maintain my academic syllabus too !

I need a book that explains the physics of pn-junction diodes. Really any reference that can help me characterize or model a diode slightly better than the ideal case.

Hello. I am reading "Introduction to Solid State Physics" by Kittel and there is a derivation in the textbook that I am understanding. This should be a fairly simple question but I am unable to see it. 1. Homework Statement In Chapter 2, it derives the Bragg law using the diffraction condition...

Homework Statement The susceptibility of a simple metal has a contribution ##\chi_{c.c}## from the conduction electrons and a contribution ##\chi_{ion}## from the diamagnetic response of the closed-shell core electrons. Taking the conduction electron susceptibility to be given by the free...

Homework Statement I'm considering a molecule made by three atoms, each a vertex of an equilateral triangle. Each atom has a covalent bond with its neighbours, sharing their only valence electron. I must estimate the energy gain when creating the molecule, using tight binding theory. Homework...

For the crystal lattices and structure Question picture is uploaded. Question.jpg My attempted answer is uploaded by a picture. My attempted ans. 1.jpg My attempted ans. 2.jpgThere is any mistake?

Hi, I need to teach a lesson on electrons in periodic potentials for Bachelor Physics students in just 20 minutes Any ideas on how to organize the lesson (pre-concepts they should know, relevant message and consequences) would be very much appreciated

The question is about to derive an approximate expression by regular solution theory, It is difficult for me to find relevant source on this question. However, the question to me is so vague that I do not know how to answer. What I have tried is to search what the interaction parameter is...

Hi! I'm trying to show how the chemical potential depends on the temperature and I'm advised to use the Sommerfeld expansion. I'm using it on the density of charge n=\int^{+\infty}_{-\infty} \rho(\epsilon)n_Fd\epsilon , which gives n=\int^{\mu}_{0} \rho(\epsilon)d\epsilon...

My university lecturer is very new, his lectures and notes are hard to follow and understand. He was a replacement to the old solid state physics lecturer and has designed the module from scratch, so it is unpolished in its current form. Can you please suggest some alternative resources...

Hello! I am going to enroll in a Solid State physics course and I want to know what good books are out there on the subject at an undergrad level. Any suggestions are appreciated! Thanks!

Hi everyone! I am trying to create a crude electron-hopping model to study conductivity in a biological wire composed of discrete sites. The model is pretty simple: imagine a line composed of sites. Electrons can hop from site to site with probabilities that depend on the free energy difference...

This is schematic band structure for the dxz and dyz orbitals using a 2D square Fe lattice. What is the location in the Brillouin zone of the hole-like Fermi surface and the electron-like Fermi surface?

How exactly does hydrostatic pressure affect the shape and size of each Fermi surface in Figure 4B? How do you read this figure or what exactly is it showing?

Homework Statement Which cannot be the structure of two acoustic branches, nor three acoustic branches? Simple cubic, FCC, BCC, diamond cubic, NaCl lattice Homework Equations N/A http://solid.fizica.unibuc.ro/cursuri/solid_en/curs_solid_EN.pdf#page=61...

Homework Statement In solid state physics,we know all the states of free electrons can be expressed by the First Brillouin Zone. We know the $$E(k+K)=E(k)$$ where K is reciprocal lattice vector. We also know that the kinetic energy of the electron is $$E_{k}=\frac{\hbar^2k^2}{2m}$$. [/B]...

In a degenerate n type semiconductor, when the doping concentration has a gradient(say -ve gradient), then how fermi energy level and intrinsic Fermi energy levels will depend upon the concentration gradient? ~If anyone knows anything about it, kindly help.

Homework Statement Based on sizes for Na(.97 Angstroms), Cs(1.67 Angstroms), and Cl(1.81 Angstroms), which lattice type would you expect for NaCl and CsCl and why? Homework Equations My equation for the hole size for a bcc is (4/sqrt(3))(radius)-2(radius), I assume you put in the radius of Cl...

Dear All, I have a monoclinic cell with a=18.7,b=3.55,c=9.069 and beta=134 degrees, angle between a and c. Now I need to make the c axis parallel to z axis for surface calculations, ie to introduce a vacuum. What is the rotation matrix that would do this?? Thank you.

Homework Statement Q3a [/B] Copper (Cu) crystallises in a face-‐centre cubic (fcc) structure (with a basis of one copper atom). Draw a diagram of the unit cell of Cu, on your diagram indicate the (1, 1, 0) lattice plane and the [2, 2, 1] lattice direction. Q3b: Calculate the...

I wasn't sure if I should post this in general discussion or in solid state section, but am I the only one who finds the Kittel textbook horrible? It seems full of semi-empirical, basic math, and boring, surface level observations written as dryly as possible. I really like solid state physics...

Homework Statement [/B] My question is more about the math of the problem. For equation 22.97, how do I construct a 3x3 matrix from a 12 element series? After constructing the matrix should I set the determinant equal to 0 where I will find the determinant has 3 solutions (2 being...

Hello I wish if anybody can enlighten me about experimental solid state physics. What they do every day? I mean who enroll in this major what careers they can find after completing their master degree in it? Is their a ph.D related to this major?

Homework Statement For one-dimensional monatomic crystals, the dispersion plot for phonons has a maximum frequency ωmax. If a driving force oscillates the crystal beyond this frequency, the phonon will no longer propagate and will instead decay as it gets further from the external source of...

I heard of it several times in colloquiums. But I still cannot grasp the meaning. What is the control parameter in this phase transition?

Hello I am having a really bad semester with solid state physics material, the book "introduction to solid state physics" by kittel is hard to follow and vague also it doesn't provide good explanations, always brief and fast. More than that my prof. is really good but have problems in...

Recently, topological concepts are popular in solid state physics, and berry connection and berry curvature are introduced in band theory. The integration of berry curvature, i.e. chern number, is quantized because Brillouin zone is a torus. However, I cannot justify the argument that...