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New Findings from Industrial University of Santander in Low Dimensional Structures Provides New Insights (Magnetoexciton in nonuniform quantum ring...

July 22, 2014



New Findings from Industrial University of Santander in Low Dimensional Structures Provides New Insights (Magnetoexciton in nonuniform quantum ring with crater-shaped central hole)

By a News Reporter-Staff News Editor at Physics Week -- Researchers detail new data in Low Dimensional Structures. According to news originating from Bucaramanga, Colombia, by VerticalNews correspondents, research stated, "We study the spectral properties of magnetoexciton in a non-uniform crater-shaped quantum dot that is modeled by a thin layer, whose thickness increases linearly with different slopes in different radial directions between the central hole and the outer border."

Our news journalists obtained a quote from the research from the Industrial University of Santander, "We show that in the adiabatic limit, when the crater thickness is much smaller than its lateral dimension, the one-particle wave functions of the electron and hole can be found exactly in an analytical form and they can be used subsequently as base functions in the framework of the diagonalization method to study the spectral properties of the magnetoexciton confined in a non-uniform quantum ring. It is found that some lower energy levels of the magnetic exciton show Aharonov-Bohm behavior in spite that the electrostatic attraction and the structural non-uniformity have the tendency to supress it."

According to the news editors, the research concluded: "We attribute this result to the tunneling of the particles in their rotational movement along the crater rim induced by the external magnetic field, through the potential barriers generated by the electron-hole interaction and the additional confinement due to the presence of the structural non-uniformities."

For more information on this research see: Magnetoexciton in nonuniform quantum ring with crater-shaped central hole. Physica E-Low-Dimensional Systems & Nanostructures, 2014;60():23-30. Physica E-Low-Dimensional Systems & Nanostructures can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

The news correspondents report that additional information may be obtained from L.F. Garcia, Univ Ind Santander, Escuela Fis, Bucaramanga 678, Colombia. Additional authors for this research include F.A. Rodriguez-Prada and I.D. Mikhailov.

Keywords for this news article include: Colombia, Bucaramanga, South America, Low Dimensional Structures

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Source: Physics Week


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