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Study of local density of electron states in InGaAs/GaAs quantum rings by combined STM/AFM |
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| Authors: | Filatov D. O. Borodin P. A. Bukharaev A. A. |
| Affiliation: | 1.Lobachevsky University of Nizhni Novgorod, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia ;2.Zavoisky Physical Technical Institute, Russian Academy of Sciences, 10/7 Sibirski trakt, Kazan, 420029, Russia ; |
| Abstract: | The electronic structure of self-assembled InGaAs/GaAs(001) quantum rings grown by atmospheric pressure metal-organic vapor phase epitaxy has been investigated by combined scanning tunneling/atomic force microscopy (STM/AFM) in ultrahigh vacuum (UHV) for the first time. The current images and the tunnel spectra of contact of Pt-coated Si AFM probe to the quantum ring heterostructure surface revealing the spatial distribution of the local density of states and the electron size quantization spectra in the quantum rings have been obtained. |
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