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A Magnetic response of a degenerate Fermi gas

  1. Mar 16, 2019 at 11:36 PM #1
    I know that in a Fermi gas, the two common responses to a lo field are Pauli par. and Landau dia. and the last becomes the H-VA effect

    My question is, it is the same treatment in degenerated Fermi Gas?
     
  2. jcsd
  3. Mar 19, 2019 at 12:15 PM #2

    Lord Jestocost

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    One speaks of a “degenerate” Fermi gas in case its temperature T is much lower than its Fermi temperature TF: T << TF = εF/kB where kB is the Boltzmann constant and εF the Fermi energy at T = 0. What is termed “Pauli paramagnetism” for the behavior of conduction electrons in metals when subjected to a magnetic field is derived on base of the assumption that there is a degenerate Fermi gas.
     
  4. Mar 19, 2019 at 6:57 PM #3
    And what happens with landau diamagnetism? Because it comes by the movement of delocalized electrons
     
  5. Mar 20, 2019 at 3:41 AM #4

    Lord Jestocost

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    Charged particles couple to a magnetic field via their charge, leading to a diamagnetic contribution to the magnetic susceptibility. At low temperatures (degenerate case), this effect in a free electron gas is known as Landau diamagnetism.
     
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