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

ABSTRACT: 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 artifcial hydrogen molecule energy structure may be tuned by changing the external field strengths.

• Autores: Rincón Fulla, Marlon; Marín Cadavid, ‪Jairo Humberto; Ospina Londoño, Diego Arley; Duque Echeverri, Carlos Alberto; Mora Ramos, Miguel Eduardo
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2014
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/20838
• Acceso en línea: http://hdl.handle.net/10495/20838
• Palabra clave: Semiconductores; Semiconductors; Presión hidrostática; Hydrostatic pressure; Campo magnético; Magnetic field; Puntos cuánticos; Anillos cuánticos; Electrones acoplados; http://aims.fao.org/aos/agrovoc/c_33982
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/