000			02754ntm a22002297a 4500
008			201217b2013 a|||f mb|| 00| 0 eng d
041	0		_aeng _beng _bara
082			_a620
100	0		_aHazem Mohamed Mahmoud Abdelhafiz _9210
245	1		_aResonance Phenomena in Coupled Josephson Junctions _cHazem Mohamed Mahmoud Abdelhafiz
260			_c2013
300			_a p. _bill. _c21 cm.
500			_3Supervisor: Wael Akl
502			_aThesis (M.A.)—Nile University, Egypt, 2013 .
504			_a"Includes bibliographical references"
505	0		_aContents: 2 Theoretical Study 14 2.1 Coupled Superconductors . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2 Electron Tunneling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.3 Josephson equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.4 The Josephson critical current Ic . . . . . . . . . . . . . . . . . . . . . . . 22 3 Computational methods 24 3.1 Runge-Kutta Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.1.1 Second-Order method . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.1.2 Fourth-Order Methods . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.2 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.2.1 Capacitively coupled Josephson junctions (CCJJ) . . . . . . . . . . 26 iii Contents iv 3.2.2 Capacitively coupled Josephson junctions with diffusion current (CCJJ+DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.3 System of equations of IJJ . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4 Results and Discussion 35 4.1 Charge density wave in IJJ . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.2 Dynamics of transition LPW → CDW . . . . . . . . . . . . . . . . . . . . 36 4.3 Transformations CDW → CDW . . . . . . . . . . . . . . . . . . . . . . . 37 4.4 Radiation effect on IJJ . . .
520	3		_aAbstract: We demonstrate the creation of a charge density wave (CDW) along a stack of coupled Josephson junctions in layered superconductors. Electric charge in each superconducting layer oscillates around some average value, forming a breathing CDW. We show the transformation of a longitudinal plasma wave to a CDW in the state corresponding to the outermost branch. Transitions between different types of CDW’s, related to the inner branches of current voltage characteristics, are demonstrated. We will show the effect of radiation on the CDW and the appearance of Shapiro steps in the inner branch.
546			_aText in English, abstracts in English and Arabic
655		7	_2NULIB _aDissertation, Academic _9187
690			_aNano- Science & Technology _9199
942			_2ddc _cTH
999			_c8750 _d8750