Spherical, cylindrical and tetrahedral symmetries; hydrogenic states at high magnetic field in Si:P
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Data
2013-12-12
Autores
Lewis, R. A.
Bruno-Alfonso, A. [UNESP]
Souza, G. V. B. de [UNESP]
Vickers, R. E. M.
Colla, J. A.
Constable, E.
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Nature Publishing Group
Resumo
Phosphorous donors in silicon have an electronic structure that mimics the hydrogen atom, albeit on a larger length, smaller energy and smaller magnetic field scale. While the hydrogen atom is spherically symmetric, an applied magnetic field imposes cylindrical symmetry, and the solid-state analogue involves, in addition, the symmetry of the Si crystal. For one magnetic field direction, all six conduction-band valleys of Si:P become equivalent. New experimental data to high laboratory fields (30 T), supported by new calculations, demonstrate that this high symmetry field orientation allows the most direct comparison with free hydrogen.
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Scientific Reports. London: Nature Publishing Group, v. 3, 3 p., 2013.