Theory of the <I>g</I>-Factor in Graphite Intercalation Compounds
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概要
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Based on Blinowski-Rigaux's band model, an expression for the <I>g</I>-shift (<I>Δg</I>) in stage-4 donor graphite intercalation compound has been derived by using the Dresselhaus-Dresselhaus spin-orbit Hamiltonian. If the bands are labeled as B<SUP>−</SUP>, A<SUP>−</SUP>, B<SUP>+</SUP> and A<SUP>+</SUP> in order of energy <I>E<SUB>s</SUB></I>, <I>g</I>-shifts for A<SUP>±</SUP>- and B<SUP>±</SUP>-states are of opposite sign to each other, and in most cases |<I>Δg</I>(A<SUP>−</SUP>)|>|<I>Δg</I>(B<SUP>−</SUP>)|>|<I>Δg</I>(B<SUP>+</SUP>)|>|<I>Δg</I>(A<SUP>+</SUP>)|. Since the higher the energy <I>E<SUB>s</SUB></I> the less the state density, the total <I>g</I>-shift <I>Δg</I>=Σ<I><SUB>s</SUB></I>Σ<I><SUB>Es</SUB>Δg</I>(<I>E<SUB>s</SUB></I>)δ(<I>E<SUB>s</SUB></I>−<I>E<SUB>F</SUB></I>)⁄Σ<I><SUB>s</SUB></I>Σ<I><SUB>Es</SUB></I>δ(<I>E<SUB>s</SUB></I>−<I>E<SUB>F</SUB></I>) is very small in agreement with the observations: If the Fermi level crosses the four bands <I>Δg</I> becomes essentially zero, while the crossing with the three bands A<SUP>−</SUP>, B<SUP>+</SUP> and A<SUP>+</SUP> makes <I>Δg</I> finite but still small in the magnitude. Each <I>Δg</I>(<I>E<SUB>s</SUB></I>) is very sensitive to the potential difference between the bounding and interior layers.
- 社団法人 日本物理学会の論文
社団法人 日本物理学会 | 論文
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