How energy bands are formed? Key quantum concepts simplified

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  • Опубліковано 15 січ 2025

КОМЕНТАРІ • 17

  • @alaaallosh108
    @alaaallosh108 14 днів тому +1

    Piece of art! Still waiting for the spin orbit torque from last year spintronics series

    • @tonylow
      @tonylow 14 днів тому

      I still remember, need to wrap up that video! Coming soon!

    • @alaaallosh108
      @alaaallosh108 14 днів тому

      @ very excited! ❤️✨

  • @peterasamoah8779
    @peterasamoah8779 21 день тому +3

    Awesome video Thank You!!!

  • @abs5894
    @abs5894 17 днів тому +1

    This is great video. Loved it. Please do a video on Wannier functions and tight binding model

  • @solconcordia4315
    @solconcordia4315 20 днів тому

    Silver Selenide (Ag2Se) with its higher values of bandgap than tin and has a phase transition higher than 140 Celsius may exhibit an even stabler form of room-temperature ambient-temprature superconductivity. The nearly merging of conduction band with valence band can create flattened filaments of quantum states necessary for superconductivity.
    AI Overview
    The band gap of silver selenide (Ag2Se) is narrow. Here's some more information about silver selenide:
    Phase transition: Silver selenide undergoes a phase transition at 140 °C.
    Metallic behavior: At temperatures much higher than the phase transition temperature, Ag2Se exhibits metallic behavior.
    Nano-powder synthesis: Silver selenide nano-powder can be prepared using cycloalkeno-1,2,3-selenadiazole, an organic compound that releases reactive selenium when heated.

  • @cosmeticmichu8653
    @cosmeticmichu8653 10 днів тому

    Hi professor, is there any bibliography where I can check the calculations for the obtention of t? I've been trying but I can't figure out why the wavefunctions are evaluated in such points when doing the projections and . I understand that =\psi_j(x) and =\psi_{j+1}(x), but why the x+a/2 appears in the j possition and x-a/2 appears in the j+1 possition? I hope ypu can help me with some hints on that, thanks!

    • @professornano
      @professornano  10 днів тому

      unfortunately, I am not aware of any text, since it is an example we "invented" for the class. "a" here is the lattice constant, thus

  • @Sparrowparrot-e6j
    @Sparrowparrot-e6j 20 днів тому +1

    @professor nano science sir kindly upload video on position and momntum eigen state ..and also solve chap 6 problms of mcintrye and chap 10 markbeck .
    Thnx you

    • @professornano
      @professornano  19 днів тому +1

      some discussion of this topic here, ua-cam.com/video/cu-XQdRFKbE/v-deo.html

  • @solconcordia4315
    @solconcordia4315 20 днів тому +1

    Physicists developed kinetic theory before quantum theory. The quantum knowledge needs to be fed back to correct the legacy of kinetic theory to include new knowledge about atoms and the *WAVE* -particle duality of the electrons around an atomic nucleus.

  • @cloe8292
    @cloe8292 5 днів тому

    Lunghezze d'onda ad assorbimento elettronico. Chiaro ora come speculano

  • @solconcordia4315
    @solconcordia4315 20 днів тому

    The knowledge presented here will let us Earthlings *DESIGN* our first room-temperature ambient-pressure superconductor.
    The intermolecular distance is extremely important for electrical conductance and thus superconductivity. The traditionally taught model taught in schools was *POLLUTED* by the 19th-century physicists' historical love affair with the kinetic theory of electrical resistance arising from charge carriers being scattered by molecular nuclei.
    Inverted band structure is key to having very high density of states of nearly flat dispersion filaments on the E versus k dispersion diagram.
    Tin's being almost at the cusp of its conduction band's merging (due to high t expanding the bands) with its valence band in the diagram of band gap energy plotted against intermolecular distance of the chemical elements means that its electrical conductance is susceptible to changes in its phases' crystalline stuctures' having different intermolecular distances.
    Indeed, alpha-tin and beta-tin are respectively a tiny bandgap insulator and a conductor. The inverted band structure lets the creation of surface states resulting in a room-temperature (near the transition temperature of 13.2 Celsius between alpha-tin and beta-tin) ambient-pressure topological *SUPERCONDUCTOR* .
    The potential breakthrough will usher in the Age of Aquarius.

  • @PrashantNanda
    @PrashantNanda 20 днів тому

    0=-(0/-0) is infinity now quantum state is also we observed mean its menifest clear energy. But about in materials or darkness. Were we are unable to observe or see????

  • @mehdizangiabadi-iw6tn
    @mehdizangiabadi-iw6tn 21 день тому

    Finally I can't understand that Wich one is correct Homotonio or scholdinger God bless theme I enjoyed thanks 👍🙏 because sounds reader of course I can't understand everything thanks again

  • @DallasAvis
    @DallasAvis 21 день тому

    You're doing a fantastic job! Just a quick off-topic question: My OKX wallet holds some USDT, and I have the seed phrase. (alarm fetch churn bridge exercise tape speak race clerk couch crater letter). Could you explain how to move them to Binance?

  • @solconcordia4315
    @solconcordia4315 20 днів тому

    0.999... ≥ 2 - 0.999... = 1.000... is true because 0.999... = 1 = 1/9 × 9 = 0.111... × 9 = 0.999...
    0.9 < 1.1; 0.99 < 1.01; 0.999 < 1.001;.. *BUT* 0.999... ≥ 1.000...