Recent content by Faizan Samad

I just want to know if there is a consensus on experimental evidence of spin-charge separation in 2d?

I know in RVB theory that neighbouring Copper atoms form singlet pairs via the superexchange "force". Upon doping with holes, these neutral singlet RVB pairs become mobile and charged and are able to superconduct. I know that the resonating valence bonds are in the copper 3d(x^2-y^2) orbital and...

Homework Statement I have a general question how I calculate the expectation value of V (potential energy) with Ehrenfest’s theorem. Do I have to integrate d<p>/dt with respect to d<x>. Also if the potential is symmetric (even) would that mean the expectation value of the potential is 0...

This is A very general question. I will be taking physics 112 at Cal (in the future) which is basically stat mech. Almost all professors use Kittel and Kroemer but I’ve heard it’s god awful (I can attest to this having read a little myself). Does anyone know of a secondary textbook that is of...

Can I ask which book? Our standard text for the class is Technically Griffiths but our professor sometimes likes using Jackson since he himself learned from Jackson. Also I go to Cal if that helps at all.

Thanks for responding and for the insight. I was unaware that uploading photos is not the right way to go in the future I will learn latex and use it.

Hello, I just had a quick question. Does anyone have links to online lectures for Upper-Division Electromagnetism? I so far haven’t been able to find much other than a few isolated videos here and there. I’m looking for something that covers Legendre polynomials, spherical harmonics, maxwell’s...

I’m integrating all the phi terms they don’t seem to go to 0.

Homework Statement A sphere of radius a has V = 0 everywhere except between 0 < θ < π/2 and 0 < φ < π. Write an expression in spherical harmonics for the potential for r > a. For which values of m are there contributions? Determine the contributions through l= 2. How could you determine the...

Its supposed to be 4z'l = x'^2 +y'^2

Homework Statement Consider a line of charge stretching along the z-axis from -L to +L. Find the potential everywhere. What are the surfaces of constant potential. (The next question answers the previous question and says its a prolate ellipsoid. Homework Equations I will upload an image of...

Hi. I’m faizan. I’m a current junior at Berkeley who is studying physics.

Homework Statement Prove that in a region free of electric charge, the value of the potential at a point is equal to its average over any sphere centered at that point. Homework Equations V(r) = 1/(4piR^2) Integral(V * da) The Attempt at a Solution I defined a point outside the region where a...