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作 者:XIEWe-Fang
机构地区:[1]DepartmentofPhysics,GuanzhouUniversity,Guangzhou510405,China
出 处:《Communications in Theoretical Physics》2003年第3期365-368,共4页理论物理通讯(英文版)
基 金:国家自然科学基金
摘 要:Making use of the method of few-body physics, the energy spectrum of a four-electron system consisting in a vertically coupled double-layer quantum dot as a function of the strength ofa magnetic field is investigated. Discontinuous ground-state transitions induced by an external magnetic field are shown. We find that, in the strong coupling case, the ground-state transitions depend not only on the external magnetic field B but also on the distance d between double-layer quantum dots. However, in the case of weak coupling, the ground-state transitions occur in the new sequence of the values of the magic angular momentum. Hence, the interlayer separation d and electron-electron interaction strongly affect the ground state of the coupled quantum dots.
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