Two Band Model for Diluted Magnetic Semiconductors: Study of the Ferromagnetic Transition Temperature
نویسندگان
چکیده
منابع مشابه
Magnetic Impurity States and Ferromagnetic Interaction in Diluted Magnetic Semiconductors
The electronic structure of diluted magnetic semiconductors is studied, especially focusing on the hole character. The Haldane-Anderson model is extend to a magnetic impurity, and is analyzed in the Hartree-Fock approximation. Due to the strong hybridization of an impurity d-states with host p-states, it is shown that holes are created in the valence band, at the same time the localized magneti...
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ing momentum p from ζ(q, ω) in equation (14) results to a relation 〈〈c†p+q,↑cp,↓;S (0, 0)〉〉 = cJ 2 〈c†p,↓cp,↓〉 − 〈c † p+q,↑cp+q,↑〉 ω − εp + εp+q − cJ〈Sz〉 ×G(q, ω). (15) Combining equations (10) and (14) results to a closed form of Green’s function equation G(q, ω), (ω − cJ〈σ〉 + cJ 2 〈S〉 ∑ p 〈c†p,↓cp,↓〉 − 〈c † p+q,↑cp+q,↑〉 ω − εp + εp+q − cJ〈Sz〉 )
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ژورنال
عنوان ژورنال: Communications in Physics
سال: 2011
ISSN: 0868-3166,0868-3166
DOI: 10.15625/0868-3166/21/2/106