Spin states and persistent currents in a quantum ring with an embedded magnetic impurity
Data(s) |
2008
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Resumo |
Spin states and persistent currents are investigated theoretically in a quantum ring with an embedded magnetic ion under a uniform magnetic field including the spin-orbit interactions. The magnetic impurity acts as a spin-dependent delta-potential for electrons and results in gaps in the energy spectrum, consequently suppressing the oscillation of the persistent currents. The competition between the Zeeman splittings and the s-d exchange interaction leads to a transition of the electron ground state in the ring. The interplay between the periodic potential induced by the Rashba and Dresselhaus spin-orbit interactions and the delta-potential induced by the magnetic impurity leads to significant variation in the energy spectrum, charge density distribution, and persistent currents of electrons in the ring. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Sheng, JS ; Chang, K .Spin states and persistent currents in a quantum ring with an embedded magnetic impurity ,JOURNAL OF PHYSICS-CONDENSED MATTER,2008 ,20(2): Art. No. 025222 |
Palavras-Chave | #半导体物理 #D EXCHANGE INTERACTION |
Tipo |
期刊论文 |