News in Press-centre

Researchers of Far Eastern Federal University (FEFU) together with Russian and international colleagues have calculated the conductivity of graphene. New data on the properties of this recently discovered material was obtained by the researchers using the Monte Carlo calculations. The results of the work are a significant contribution to the study of promising materials for the development of new technologies. The study has been published in the leading scientific journal Physical Review Letters (Impact Factor: 8.462).  

According to Denis Boyda, one of the participants in the study, the FEFU graduate, the conductivity of graphene is an open problem, scientists have created many models for solving it, but their conclusions give completely different results.

"In most works, scientists had to make approximations or introduce additional parameters in calculations, which often gives rise to doubts about the consistency and fairness of the conclusions. In our case, we took a strong coupling model that describes the behavior of free charges in graphene and added the charge interaction potential. By using the approach of quantum field theory on a lattice, we obtained expressions suitable for using the Monte Carlo calculations and carried out simulation. The obtained value of conductivity agrees well with the experimental value," explained Denis Boyda.

The researcher noted that the article is the final in a series of works published by a group of FEFU scientists. This direction has been developed for several years by Viktor Braguta, the leading research associate of FEFU and the Institute of Theoretical and Experimental Physics (Moscow), Maxim Ulybyshev, research fellow at the Institute of Theoretical Physics of the University of Regensburg (Germany), and Denis Boyda, the FEFU graduate.

"The results of the research can contribute to the study of semimetals, which include graphene. It has a number of interesting properties that can be used to develop modern technologies. For example, most recently an article was published on magnetic graphene transistors, which will allow creating processors that work thousands of times faster than current silicon analogs," Denis Boyda noted.