The orbital magnetic susceptibility of two coupled graphite layers is calculated as a function of temperature and Fermi energy (μ). The susceptibility is shown to be diamagnetic at small values of μ, and paramagnetic at large values of μ, with a paramagnetic peak at μγ₁, where γ₁ is the interlayer coupling. These results explain the increase in the susceptibility as a function of stage which has recently been observed in KC₁₂ₙ.
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S. A. Safran (1984) studied this question.
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