Scientific research Cooperation between Urmia University of Technology and Yerevan State University of Armenia
| Post date: 2023/12/10 |
According to the management of research and technology affairs, the cooperation of Urmia University of Technology and Yerevan State University of Armenia has been started in 2019 with the definition of a joint thesis entitled "Investigation of electronic and optical properties of quantum dot superlattices and synthetic graphene" for one of the PhD students in Physics from Urmia University of Technology.
Dr. Vigen Agche Qala, a member of the academic staff of the University Physics Department as the first supervisor and Dr. Veram Mughnetsyan, a member of the academic staff of the Solid State Physics Department of Yerevan State University as the second supervisor, have been in charge of directing this thesis.
Dr. Aghche Qala, in explaining the details of the research, stated that in the first stage of the research, a one-dimensional super network of planar quantum rings was considered as the studied structure. Then, the effect of transverse magnetic field on the band structure, magnetization and magnetic absorption between small energy bands was studied. In the next step, a two-dimensional artificial graphene superlattice consisting of circular and oval-shaped quantum dots was chosen as the studied structure and the electronic properties of pseudo-two-dimensional electrons were investigated without applying a magnetic field in the aforementioned artificial graphene networks. The results of this research have shown that the topology of the structure of small energy bands changes. The cause of qualitative changes in the density of states and magnetization of synthetic graphene is attributed to the deviation of the geometry of quantum dots from a circular to an elliptical shape.
Dr. Vigen Agche Qala, a member of the academic staff of the University Physics Department as the first supervisor and Dr. Veram Mughnetsyan, a member of the academic staff of the Solid State Physics Department of Yerevan State University as the second supervisor, have been in charge of directing this thesis.
Dr. Aghche Qala, in explaining the details of the research, stated that in the first stage of the research, a one-dimensional super network of planar quantum rings was considered as the studied structure. Then, the effect of transverse magnetic field on the band structure, magnetization and magnetic absorption between small energy bands was studied. In the next step, a two-dimensional artificial graphene superlattice consisting of circular and oval-shaped quantum dots was chosen as the studied structure and the electronic properties of pseudo-two-dimensional electrons were investigated without applying a magnetic field in the aforementioned artificial graphene networks. The results of this research have shown that the topology of the structure of small energy bands changes. The cause of qualitative changes in the density of states and magnetization of synthetic graphene is attributed to the deviation of the geometry of quantum dots from a circular to an elliptical shape.
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