Introduction to Solid State Physics, Lecture 5: One-dimensional models of vibrations in solids

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  • Опубликовано: 28 дек 2024

Комментарии • 17

  • @solounomas0
    @solounomas0 10 месяцев назад +1

    This is quite understandable!! Here physics major dealing with solid state physics

  • @1986Godfrey
    @1986Godfrey 6 лет назад +5

    The BEST!! Thank you sir!

  • @Neeraj-is1jt
    @Neeraj-is1jt 2 года назад

    In 13:49 can someone tell me that "w" is the frequency of vibration of a particle or the frequency of a wave??

  • @tenthousandone7372
    @tenthousandone7372 4 года назад +4

    Thank you professor! I'd like to ask what is the energy of a phonon? Is it hw or hw(n+1/2)?

    • @mahmoudmaher00
      @mahmoudmaher00 3 года назад

      It's hw, see 48:45

    • @Neeraj-is1jt
      @Neeraj-is1jt 2 года назад

      @@mahmoudmaher00 in 44:26 he said that energy of each phonon is (n+1/2)hw

  • @MaryamMful
    @MaryamMful 7 лет назад +2

    Each mode is its own linear harmonic oscillator and for each mode there are n eigenstates. In principle eigenstates are modes too. If there are N natural modes, there must me n times N modes. Is that right? I didn't really understand how you could differ between eigenstates and modes. Except maybe the latter are "natural" modes and eigenstates are excited modes.

  • @matrixate
    @matrixate 4 года назад +1

    Superb lecture. I would have liked a little more clarity about what makes the dispersion relationship between photons and optical phonons. Regardless, a fantastic job.

  • @GiorgiAptsiauriX
    @GiorgiAptsiauriX 3 года назад +1

    Your lectures are much better than Oxford ones by Dr. Simon. He goes way too fast and skips a lot of details assuming his students know all that shit. I am taking this class as someone who studies master's in electronics and I have 0 background in quantum mechanics, so for me there are a lot of unknowns here. But your lectures help more than his.

  • @Learndiyphysics
    @Learndiyphysics 3 года назад +1

    very informative!

  • @abhinavdhull1431
    @abhinavdhull1431 3 месяца назад

    does anyone have his notes?

  • @themasstermwahahahah
    @themasstermwahahahah Год назад

    the super high pitched whine in this audio is unfortenately really annoying, becuase these lectures are really good

  • @tarrytao7508
    @tarrytao7508 4 года назад +1

    slides are really good..

  • @nikhilsen9007
    @nikhilsen9007 7 лет назад +1

    How does the spring constant K and wave vector k are related ?
    during the lecture you have suddenly jumped from k(spring constant) to k(wave vector). Why?

    • @moscademuletas
      @moscademuletas 7 лет назад

      spring constant is actually KAPPA (GREEK LETTER K a bit different) and wave vector is k! k comes from the wave function only!

  • @aiswaryapriyambada2757
    @aiswaryapriyambada2757 2 года назад

    can i get the slides please

  • @yurio00
    @yurio00 7 лет назад

    No sé inglés 😭