Recent content by vatlychatran

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    High School Deriving Electron Wave Function from Hole Wave Function

    thanks!
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    High School Deriving Electron Wave Function from Hole Wave Function

    Assume that i have a wave function of holes in a solid, can we derive the wave function of electrons? If can then how?
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    Graduate Laser light vs. synchrotron light in ARPES measurements

    Thank you
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    Graduate Laser light vs. synchrotron light in ARPES measurements

    In ARPES measurements, people say that the laser light cannot cover a wide area of momentum space whereas the synchrotron light can (M. Hashimoto et al., Nat. Phys. 10 (2014) 483). Why is that? (Figure 3a in the paper is a combination of laser and synchrotron data to plot spectra along the...
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    High School Suggestions for FTIR Experiment

    Ah, you are right, i mean optical conductivity.
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    Graduate Questions about superconductivity

    Not all elements are superconductors, i think so, or at least we don't know conditions (temperature, pressure) should be for some elements such as copper , gold to become superconductors
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    Graduate Superconductivity and zero resistance

    What are zero gap superconductors? Could you give some examples? Do you mean zero gap in some directions but not in others as d-wave cuprates?
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    High School Suggestions for FTIR Experiment

    I know that people use ftir to measure conductivity, so you can try it with materials like superconductors
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    MATLAB Simulate Hysteresis Loop in MATLAB | Step-by-Step Tutorial"

    You can use Langevin function to describe a hysteresis loop. Exact form of Langervin function you can find out in many textbooks on magnetism. M(H)=M_s.[\cosh(c(H+\alpha M))-\dfrac{1}{c(H+αM)}] or use this M(H)=M_s.\tanh(c(H+\alpha M)) For the code, It is extremely easy, in ten...
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    Graduate X-Ray diffraction - The Von Laue's equation

    Hi, with only high-school knowledge you can answer your questions. PA=OP.cos(PA,OP)=OP.PA/PA.cos(PA,OP)=OP.n0 \phir is phase difference, not path difference \phir=wavevector×pathdifference wavevector=2π/λ
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    Graduate Zero resistivity in superconducting state

    Hi everyone, - Could you explain for me the meaning of "net" in the phrase "small net attraction between electrons" in superconductivity, (or synonym of it)? - We usually say that BSC theory explains the superconductivity of conventional superconductors, one feature of superconductivity is...
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    Graduate What is the other axis in molecule XeF4's D4h character table?

    I should change my question. Could you explain for me the number "2" in "2C4(z)" of the D4h character table (first row, third column in the attached figure)? Thanks a lot.
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    Graduate What is the other axis in molecule XeF4's D4h character table?

    Hi all, I consider a square planar molecule such as XeF4, Xe atom is at the center, F atoms are at the corners of a square. In the character table of D4h group that XeF4 belongs to, I see that there are two C4 axes but I only can find one that goes through the Xe atom and is perpendicular to the...
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    Graduate Calculating Spectral Weight of a Gaussian Curve

    I'm studying in superconductivity and measure Raman spectra. In fact, a detailed spectrum is not so necessary therefore as above I take a simple theoretical curve (Gaussian) to understand what spectral weight is. From papers I realize that spectral weight is area under the curve (area between...
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    Graduate Calculating Spectral Weight of a Gaussian Curve

    Now I understand that spectral weight of a spectrum is area under the spectral curve.