Double-Donor Energy Structure in Concentric Quantum Rings under Magnetic Field and Hydrostatic Pressure

• Authors: M. Fulla , J. Marín , D. Londoño , C. Duque , M. Mora-Ramos
• Languages of publication: EN

Abstracts

EN

A model for an artificial hydrogen molecule consisting of two positive on-axis Coulombic centers and two electrons coupled to them inside a double concentric quantum ring is considered. Such a nanostructure is assumed to be under the influence of external probes like hydrostatic pressure and magnetic field. By using the adiabatic approximation, the ground state energy is calculated as a function of the outer center line radius and the impurity Coulombic center separation, for different values of the hydrostatic pressure and magnetic field strength. In contrast to the single properties imposed by nature on the actual hydrogen molecule, our model allows us to explore a great variety of properties of the artificial hydrogen molecule by changing the ring dimensions. The artificial hydrogen molecule energy structure may be tuned by changing the external field strengths.

Keywords

EN

71.55.Eq; 73.20.Hb; 73.21.La

Discipline

• 73.20.Hb: Impurity and defect levels; energy states of adsorbed species
• 71.55.Eq: III-V semiconductors
• 73.21.La: Quantum dots

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 2
• Pages: 220-223

Dates

published

2014-02

Contributors

author

M. Fulla

• Institución Universitaria Pascual Bravo, AA 6564 Medellín, Colombia
• Escuela de Física, Universidad Nacional de Colombia, AA 3840, Medellín, Colombia

author

J. Marín

• Escuela de Física, Universidad Nacional de Colombia, AA 3840, Medellín, Colombia

author

D. Londoño

• Institución Universitaria Pascual Bravo, AA 6564 Medellín, Colombia

author

C. Duque

• Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia

author

M. Mora-Ramos

• Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
• Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, CP 62209, México
• Física Teórica y Aplicada, Escuela de Ingeniería de Antioquia, AA 7516, Medellín, Colombia

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Identifiers

DOI

10.12693/APhysPolA.125.220