BINDING ENERGIES OF HYDROGENIC IMPURITIES ON-CENTER AND OFF-CENTER IN CYLINDRICAL QUANTUM DOTS UNDER ELECTRIC AND MAGNETIC FIELDS

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	BINDING ENERGIES OF HYDROGENIC IMPURITIES ON-CENTER AND OFF-CENTER IN CYLINDRICAL QUANTUM DOTS UNDER ELECTRIC AND MAGNETIC FIELDS
	S. Wang; G. Z. Wei; G. Y. Yi
	2010
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	24 期号:22 页码:4293-4304
摘要	The ground-state binding energies of a hydrogenic impurity in cylindrical quantum dots (QDs) subjected to external electric and magnetic fields are investigated using the finite-difference method within the quasi-one-dimensional effective potential model. The QD is modeled by superposing a square-well potential and a strong lateral confinement potential by the combination of a parabolic potential and a changeable magnetic field. We define an effective radius of a cylindrical QD which can describe the strength of the lateral confinement. The effects of the electric fields are less important when the effective radius is very tiny, and the effects are manifested as the effective radius increases. Meanwhile, one finds that the binding energies highly depend on the impurity positions under the applied transverse fields. When the impurity is located at the right half of the cylinder,the electric field pushes the electron to the left side, then the binding energy decreases;when the impurity is located at the left, the binding energy first increases and reaches a peak value, then deceases with the electric field.
部门归属	[wei, guozhu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china. [wang, sheng] ne petr univ, coll elect sci, daqing 163318, peoples r china. [wang, sheng; wei, guozhu; yi, guangyu] northeastern univ, coll sci, shenyang 110004, peoples r china.;wei, gz (reprint author), acad sinica, int ctr mat phys, shenyang 110015, peoples r china;guozhuwei02@sina.com
关键词	Hydrogenic Impurity Cylindrical Quantum Dot Magnetic Field Electric Field Binding Energy Donor Impurity Well Wires States
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WOS记录号	WOS:000284006300011
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31512
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Wang,G. Z. Wei,G. Y. Yi. BINDING ENERGIES OF HYDROGENIC IMPURITIES ON-CENTER AND OFF-CENTER IN CYLINDRICAL QUANTUM DOTS UNDER ELECTRIC AND MAGNETIC FIELDS[J]. International Journal of Modern Physics B,2010,24(22):4293-4304.
APA	S. Wang,G. Z. Wei,&G. Y. Yi.(2010).BINDING ENERGIES OF HYDROGENIC IMPURITIES ON-CENTER AND OFF-CENTER IN CYLINDRICAL QUANTUM DOTS UNDER ELECTRIC AND MAGNETIC FIELDS.International Journal of Modern Physics B,24(22),4293-4304.
MLA	S. Wang,et al."BINDING ENERGIES OF HYDROGENIC IMPURITIES ON-CENTER AND OFF-CENTER IN CYLINDRICAL QUANTUM DOTS UNDER ELECTRIC AND MAGNETIC FIELDS".International Journal of Modern Physics B 24.22(2010):4293-4304.