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Öğe Critical current of dc SQUID on Josephson junctions with unconventional current-phase relation(Aip Publishing, 2020) Askerzade, I. N.; Askerbeyli, R. T.Here we present calculations of the critical current of dc SQUID based on Josephson junction with un-conventional current-phase relation. We analyzed two cases of current-phase relation of junction: with anhar-monic and Majorana term. It is shown that the changing of the critical current in the case of the small geo-metrical inductance of dc SQUID based on Josephson junctions with unconventional current-phase relation is determined by the amplitude of the second term in current-phase relation, the geometrical inductance of dc SQUID and external magnetic field. In the case of the high inductance of dc SQUID unconventional terms can be ignored.Öğe Effect of unconventional current-phase relation of Josephson junction on escape rate in ac SQUID(Elsevier, 2022) Askerzade, I. N.; Askerbeyli, R. T.; Ulku, I.The escape rate of S -> R switching (from superconducting S state to unstable resistive R state) in an ac SQUID on Josephson junction with unconventional current-phase relation was investigated. We used two types of currentphase relations with additional terms to the first harmonic sin phi: a case of the second harmonic sin2 phi and a case of the fractional term sin(phi/2). It was shown that escape rate can exhibit qualitative features in the case of junctions with unconventional current-phase relations.Öğe Plasmon spectrum of graphene monolayer on substrate(World Scientific Publ Co Pte Ltd, 2019) Askerzade, I. N.; Askerbeyli, R. T.Plasmon modes in monolayer graphene on substrate are analyzed taking into account the thickness of graphene and substrate material layer in the evaluation of Coulomb potential. It is shown that plasmon mode in graphene monolayer has linear dispersion in contrast to multilayer graphene in long-wavelength limit. The slope of plasmon spectrum is determined by the thickness and dielectric constant of substrate. Obtained results are in good agreement with experimental data and other theoretical considerations.Öğe THERMAL ACTIVATION IN SMALL JOSEPHSON JUNCTION(Baku State Univ, 2019) Askerzade, I. N.; Askerbeyli, R. T.In this study we carried out the analysis of the thermal activation of small Josephson junction (JJ). An expression for the fluctuation of Coulomb blockade edge in the case of low and high growing rate of voltage was obtained. It was shown that dynamics of small size JJ under termal fluctuations is determined by the energy ratio-parameter, temperature and growing rate of voltage.Öğe TWO-BAND GINZBURG-LANDAU EQUATIONS: NUMERICAL SIMULATIONS(Baku State Univ, Inst Applied Mathematics, 2018) Askerzade, I. N.; Askerbeyli, R. T.[No abstract available]
