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Next in LRG

We believe that science and scientists should develop themselves in accordance with the spirit of the time. Adhering to this value, we are constantly asking what we can do on top of our own expertise. “Next in LRG” acts as a kind of blog for us where we write down our decisions that may affect our next few years.

CuOXMist and expanding the investigation of 2D/3D materials with defects and impurities

Aug 23, 2022. S. B. Lisesivdin

A year ago, we had some obstacles before we could start the scientific studies we envisioned for 2022. During this period, our experimental-based project named CuOXMist, which includes copper oxide and gallium oxide growths, was accepted within our university and became active as of April 2022. Getting our computational studies to use GPAW and our own gpaw-tools was a time-consuming process. We wrote code for long hours on gpaw-tools software with our own means. And as of about July, gpaw-tools has been able to perform polyatomic LCAO calculations as we want. We have accelerated our computational studies as of July, and we have given importance to gather experience in this field, which we have not been able to give due importance to in the last few years.

When we look at 2023, we foresee that our work will focus on the above-mentioned issues. Our experimental work will focus on oxide thin films and multistructures that we will grow within the scope of the CuOXMist project. In the computational field, we will focus on the calculations of some oxide materials associated with CuOXMist and the effects of defects and impurities in 2D and 3D different materials on the electronic, elastic and optical properties of those structures. It will be our priority to examine many different materials. We can also specialize in some of these interesting subjects in the following years.

Apart from this, we will have many educational activities in 2023. In addition to the courses and students in Gazi University Science Institute, we will start teaching and employing graduate students at the Informatics Institute for the first time this year. We think that these activities in the Informatics Institute will make additional contributions to our computational studies and coding processes.

Focus on Hybrid Investigation of Defects in 2D/3D Structures

Sep 15, 2021. S. B. Lisesivdin

As the pandemic continues, we have learned to study, work and educate with computers. LRG has a long past with computational studies and with the changing time, we changed and adapted to the time. As a hybrid group, we can do both experimental and computational studies, every student in our group knows both experimental and computational facilities in the laboratory. We are accepting this as a richness of possibilities. We can purely do computational studies, or experimental. Our projects always have both. Since 2011, we are using ATK for our Density Functional Theory (DFT) studies. However, because of living some problems with getting a new license through Europractice, we have been searching for new possibilities. For this, we chose GPAW for our further studies and have started a small software called gpaw-tools which is a UI/GUI. With gpaw-tools, it is now possible to do nearly all calculations that we have done with ATK. Because we are a small group now, in 2022, we will focus to use GPAW and develop gpaw-tools to make this migration without any problem.

With the migration to GPAW, we also want to focus our studies on the effects of low-dimensional phenomena. With relation to our previous experimental/computational studies done with the University of Ulm, we want to investigate the effects of defects on 2D/3D structures.

We also formed a sister lab at Lab-305 room. It is called Defect Hybrid Analysis Laboratory. It will also work on defects in semiconductors and insulators by computational and experimental ways of work. In Lab 335, we will continue to grow oxide materials and will investigate possible low-dimensional effects.

Hybrid Operation in every situation

Nov 23, 2020. S. B. Lisesivdin

With the COVID-19 pandemic, our lives change invariably. As scientists and faculty members of a Gazi University, we have already changed to many things in our education system. With addition of our past experiences involving long term experimental system shutdowns, constructions and similar unpredictable problems we adapted and improved ourselves how to work and what to work.

As LRG Research Group, we want to continue our studies with a hybrid approach in “every sense” in the next few years.

  1. Hybrid working as type: Beginning with the first days of our group we are studying both experimental and calculational subjects. All our projects included both parts of these study types. We would like to extend our studies in this sense.
  2. Hybrid working as place: With the pandemic we are now can work locally or remotely. We can provide experimental or calculational subjects to our students with thinking possibility to attend laboratory or not.
  3. Hybrid working as subject: Most of our subjects involving hybrid material systems to study. For example: We are interested in 2DEG populations in ZnO/GaN based hybrid heterostructures. We are also interested in GaN HEMT / Diamond NV center hybrid devices for 2DEG mapping. And list can be go up like this. The interactions between two material systems are giving many new possibilities and these possibilities make these subjects attractive.
  4. Hybrid education: With the pandemic, our university utilized an online education system. We are performing our undergraduate and graduate courses using this system. In addition to these courses, our group uses video lectures in group-wide education of new MSc and PhD students and performing Zoom group meetings as well. Of course we are continuing to study face to face as much as pandemic regulations allows us.