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subband    
次能带; 部分波段

次能带; 部分波段


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  • What exactly are subbands in condensed matter physics?
    But sometimes, the subbands matter There can be low energy electron transitions between subband states (inter-subband transitions), for example In these, if the electron was in the “valence band”, it remains in the “valence band” but is now in a different subband
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    Does that mean that centripetal force arises because of circular motion? No Newton’s first law states that an object at rest or moving in a straight line at constant speed will remain at rest or continue to move in a straight line at constant speed unless acted upon by a net force Therefore circular motion is the result of the centripetal force and not the other way around The centripetal
  • Air pressure on Noahs Ark - Physics Stack Exchange
    My mother asked me today: quot;If Noah's Ark was above the highest peaks, how were they breathing, and staying warm? quot; Now, I'm not trying to make a case for the feasibility of Noah's Ark, I
  • Why do we have heavy and light hole bands in semiconductors?
    On the topic of the valence band of a semiconductor (in this example GaAS), it is the case that the valence band has some structure to it As shown in the illustration below, we see that at the $\\G
  • condensed matter - Understanding effective mass of electron for . . .
    Know someone who can answer? Share a link to this question via email, Twitter, or Facebook
  • Cooling due to evaporation - Physics Stack Exchange
    The figure 1 600 comes from the specific heat of water divided by its latent heat of vaporization The specific heat of water tells you the amount of energy it takes to raise its temperature, and is approximately 4 18 kJ (kg $\cdot$ K) The latent heat is the energy required to evaporate the water, and is approximately 2460 kJ kg [1] The ratio of these two numbers is approximately 1 600
  • Effective mass as a consequence of energy band structure
    Effective mass is defined as $ (m^*)^ {-1}= \frac {\partial^2 E} {\partial k^2}$ so this equation explains the relation of the effective mass to the curvature of the parabolic band structure!
  • Why is the conduction band of Si not monotonic?
    If we consider a subband of the conduction band within the first Brillouin zones, we can clearly see that this subband is not monotonic It involves more than one local minima or maxima points within the first zone, which confuse me a lot What the physical reason that causes the non-monotonic feature of the conduction band?
  • What are s-bands and d-bands in band structures?
    I am not sure, in the book I'm reading they keep talking about s-bands and d-bands crossing the Fermi energy level relating to effective masses
  • Formula for air density given temperature, pressure, humidity
    What is a good formula for air density (kg m^3) given temperature (°C), pressure (hPa), and relative humidity? I tried implementing the formulas from here as follows: import math def air_density (





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