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Tatiana Karminskaya (promotion date: 16 February 2011)

Theory of Josephson effect in junctions with complex ferromagnetic/normal metal weak link region

Promotion date: 16. February 2011

Promotor: Prof. Dr. Horst Rogalla

Assistant Promotor: Dr. Alexander Golubov

A theoretical study of physical foundations for creation of fundamentally new devices for nanoelectronics, spintronics and superconducting electronics, is presented. Special interest is given to new fundamental effects in structures containing ferromagnetic and superconducting layers, as well as the possibility of utilizing these effects for spin valves.

There are serious restrictions on the operating parameters of known prototypes of superconducting spin valves, in which control of the critical current and critical temperature is possible. New design solutions are explored to solve these problems.

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What was the main challenge of the thesis project?

I analytically described new kinds of devices of spin valves, and proposed new geometry design guidelines. In this way critical temperatures and currents are better controllable.

So, you are more a theorist than an experimentalist then.

Yes, I am a theorist. My experience in experiments is rather limited. I tried to realise experimentally some of my findings in the first period of my PhD project.

Members of the Interfaces and Correlated Electron systems, in particular my co-promotor Alexander Golubov, advised me on design matters of building the structures I proposed. I hope these structures will be fabricated in the future, in superconductive electronics or as elements in memories of quantum computers.

Did some publications come out of your research?

I published ten papers in international journals, including Physical Review B and in Russian journals e.g. JETP Letters. Also I made about twenty presentations at different international conferences.

What are your future plans?

Right now, I am working as a research fellow at the Moscow State University, continuing this particular field of research. I like being a scientist, ever since I was a child. At the age of ten years, I started reading scientific books. From then on it is an important part of my life.

What, in your opinion, is important for Mesa+ to stay successful in the future?

I don’t have a clear opinion about that. The main part of my work was performed in Moscow, and was helped a great deal by collaboration with Alexander Golubov. Mesa+ is well known in Russia and I visited the institute several times with great pleasure. I hope to stay connected with Mesa+ in my future work.