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Showing 1 to 10 of 10 for “"current-phase relation"”.
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The current-phase relation of graphene-based Josephson junctions
The current-phase relation (CPR) of a Josephson junction reveals valuable information about the microscopic processes and symmetries that influence the supercurrent. For the work described in this thesis, we have studied the CPR of graphene-based Jospehson junctions, inspired by previous …
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Investigation of current-phase relation in topological insulator Josephson junction
In this thesis, we present current-phase relation (CPR) study of S-TI-S lateral Josephson junction (TIJJ). In a magnetic field, localized Majorana bound states (MBS) are predicted to exist at the core of Josephson vortices. One of the key characteristics of such MBS in TIJJ system is that they …
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Current-Phase Relations of Josephson Junctions with Ferromagnetic Barriers
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-12T20:40:54Z No. of bitstreams: 1 Frolov.pdf: 5531521 bytes, checksum: 087490e640910b31d2f35f988a65e3bd (MD5)
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Ultracold Bosonic Gases: Superfluidity and Quantum Interferometry
… the various regimes of transport by the current-phase relation and the Josephson plasma oscillations, and then turning to the superfluid instability, determining critical velocities and examining the dissipation dynamics in different geometries and dimensionalities. Secondly, the analysis …
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Josephson Currents In Two-Gap Superconductor-Insulator- Superconductor Junctions
… study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density …
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Exploring exotic superconducting order in La-based cuprate materials using Josephson interferometry
… through a junction depends on the difference in phase of the superconducting order parameter across the junction. We present the results of two measurements which involve the fabrication of Josephson junctions on unconventional high-temperature superconductors to study the physical processes …
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Supercurrents in Restricted Geometries and Driven by Time-Dependent Electric Fields
… neutrality which together fully determine the current in one-dimensional systems. For answering the question how this constant current is established in the non-homogeneous NS contact, the quasiclassical equations were solved including the self-consistencies for the order parameter, the …
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Non-Sinusoidal Current -Phase Relations in Superconductor-Ferromagnet-Superconductor Josephson Junctions
We have directly measured the current-phase relation (CPR) of a superconductor-ferromagnet-superconductor (SFS) Josephson junction, and determined that it contains a positive second-harmonic term proportional to sin(2&phis;). The second-harmonic term becomes dominant near Tpi, the temperature at …
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Phase-sensitive probes of extended topological Josephson junctions
… exhibit 4π-periodic signatures in the Josephson phase due to MBSs. We study multiple approaches to measuring phase-sensitive phenomena in S-TI-S Josephson junctions through indirect and direct measurements of the current-phase relation (CPR) using Josephson interferometry. Through indirect …
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The cold atom toolbox in momentum space
… and directly observed the resulting chiral currents in both a square ladder and zigzag lattice geometry. We have further monitored the quantum walk behavior of atoms under disordered and pseudodisordered lattices, observing a transition to localization under a quasiperiodic potential. We …