Properties of dynamics and current-voltage characteristics of Josephson nanostructures, caused by resonant, topological and nonequilibrium phenomena
Seminars
Theory of Condensed Matter – Seminar “Statistical Mechanics”
Date and Time: Tuesday, 3 April 2018, at 4:00 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «Properties of dynamics and current-voltage characteristics of Josephson nanostructures, caused by resonant, topological and nonequilibrium phenomena»
Speaker: K.V. Kulikov (BLTP, JINR)
Abstract:
A theoretical basis for the development of a new method for applying voltage standard is proposed. It allows to significantly reduce the power of external electromagnetic radiation needed for such an experiment. It is shown that, in a system of coupled Josephson junctions, the time dependence of the total voltage of stack reflects the appearance of an electric charge on superconducting layers. This effect can be used as the basis for the detection method of the charge. A phase-sensitive method for detecting Majorana bound states in Josephson nanostructures is developed. It is shown, that the charge imbalance of the branches of the elementary excitations spectrum leads to a slope of the Shapiro steps on the current-voltage characteristic.