Open AccessРезонансные ступени тока в джозефсоновских структурах с прослойкой из материала, обладающего сильным спин-орбитальным взаимодействием
Author(s) -
К.И. Константинян,
Г.А. Овсянников,
А.М. Петржик,
А.В. Шадрин,
Ю.В. Кислинский,
G. Cristiani,
Г. Логвенов
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.09.49758.03h
Subject(s) - condensed matter physics , microwave , antiferromagnetism , biasing , polarity (international relations) , amplitude , voltage , heterojunction , magnetic field , asymmetry , physics , materials science , chemistry , optics , biochemistry , quantum mechanics , cell
We report on results of experimental study of mesa heterostructures Nb/Au/Sr2IrO4/YBa2Cu3Ox with the barrier layer of Sr2IrO4, a material known as Mott antiferromagnetic insulator with high spin-orbit interaction energy, ESO ~ 0.4 eV. Under the influence of magnetic field H<15 Oe the resonant steps were registered at voltages Vn 1/L, inversely proportional to the width of the structures L. In contrast to the equidistant Fiske steps, changing the polarity of biasing current I, an asymmetry in Vn has been observed with a difference of voltage spacing between the steps. A change of applied magnetic field H has no effect of the voltages positions Vn , but the amplitudes of steps oscillate. Under microwave irradiation the Shapiro steps were observed demonstrating an oscillating behavior with power of applied microwaves.