Spin-wave relaxation in diluted magnetic semiconductors within the self-consistent Green’s function approach
نویسندگان
چکیده
منابع مشابه
Spin currents in diluted magnetic semiconductors.
We study zero-bias spin separation in (Cd,Mn)Te/(Cd,Mg)Te diluted magnetic semiconductor structures. The spin current generated by electron gas heating under terahertz radiation is converted into a net electric current by applying an external magnetic field. The experiments show that the spin polarization of the magnetic ion system enhances drastically the conversion process due to giant Zeeman...
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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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We present a study of the dielectric function of metallic (III,Mn)V diluted magnetic semiconductors in the infrared regime. Our theoretical approach is based on the kinetic exchange model for carrier induced (III,Mn)V ferromagnetism. The dielectric function is calculated within the random phase approximation and, within this metallic regime, we treat disorder effects perturbatively and thermal ...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2006
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.2335666