Recent content by xiyangxixia

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    Graduate What is the Third Spin in Frustrated Magnetics Lattices?

    They has a atomic spin in every corner of equilateral triangle. One is up ,the other is down. What is the third? It can not down or up at the same time. This phenomenon is called frustrated magnetics
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    Graduate Understanding Landau Level Broadening in Magnetic Fields

    The scope of energy level get large.
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    Graduate How Do Molecular Magnetic Moments Cause Magnetism in Dielectric Crystals?

    molecular magnetic moment cause the magnetism.
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    Graduate The molecular field approximation

    mean-field approximation method
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    Undergrad What is the basis in crystalline solid structures?

    The crystal must at least two basis if they are SCC. Similarly, FCC at least four basis.
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    Graduate What is the relationship between Fermi energy and temperature?

    If Ec-Ef>>0, they are under degerancy. If 0<Ec-Ef<2KT, they are under weak degenerancy. If Ec-Ef>2KT, they are under nondegenerancy. The energy of electron became larger with temperature increase. Many electrons escaped from feimi energy level.