NON- SINUSOIDAL CURRENT- PHASE RELATIONS IN N- SINUSOIDAL CURRENT- PHASE RELATIONS IN SUPERCONDUCTOR- FERROMAGNET- SUPERCONDUCTOR JOSEPHSON JUNCTIONS BY MICAH JOHN ATMAN STOUTIMORE B. University of Florida. University of Illinois at Urbana- Champaign. DISSERTATION Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Physics. Non- sinusoidal current- phase relations in. The interaction of the correlated electron states from the superconductor with the ferromagnet causes the superconducting order parameter to oscillate so that the ground state can have a phase difference of zero. As in a conventional Josephson junction. **Non-Sinusoidal Current-Phase Relations in Superconductor-Ferromagnet-Superconductor Josephson Junctions - Micah John Atman Stoutimore**

Or a phase difference of pi. Depending on the barrier thickness. The oscillation length is a function of the ferromagnetic exchange energy. So SFS junctions with Eex ≈ Tc. The superconducting. IDEALS @ Illinois. Non- Sinusoidal Current - Phase n- Sinusoidal Current - Phase Relations in Superconductor- Ferromagnet- Superconductor Josephson Junctions. **Non-Sinusoidal Current-Phase Relations in Superconductor-Ferromagnet-Superconductor Josephson Junctions - Micah John Atman Stoutimore**

Micah John Atman. Doctoral Committee Chair s. Degree Granting Institution. Non- Sinusoidal Current - Phase Relations in Superconductor. By Micah John Atman Stoutimore Abstract 84 p. - - University of Illinois at Urbana- Champaign. **Non-Sinusoidal Current-Phase Relations in Superconductor-Ferromagnet-Superconductor Josephson Junctions - Micah John Atman Stoutimore**

We have directly measured the current- phase relation. Of a superconductor- ferromagnet- superconductor. Josephson junction. And determined that it contains a positive second- harmonic term proportional to sin 2& phis;. Non- sinusoidal current- phase relations in SFS pi- Josephson. We report the direct observation of a sin 2φ.

Component in the current- phase relation. Of Superconductor- Ferromagnet- Superconductor. Josephson junctions. The deviation from a sinusoidal CPR is most evident near the crossover between the 0- junction to π- junction states reached by tuning the thickness of the ferromagnet barrier and the temperature. We measure the CPR in Nb- CuNi- Nb junctions using a phase- sensitive Josephson interferometer technique in which the junctions are. Nonsinusoidal Current- Phase Relationship in Josephson.

We use superconducting quantum interference device microscopy to characterize the current- phase relation. Of Josephson junctions from the three- dimensional topological insulator HgTe. We find clear skewness in the CPRs of HgTe junctions ranging in length from 200 to 600 nm. The skewness indicates that the Josephson current is predominantly carried by Andreev bound states with high transmittance. And the fact that the skewness persists in junctions that are longer. APS - APS March Meeting.

- Event - Non- sinusoidal. Non- sinusoidal current- phase relations in SFS pi- Josephson junctions* 8 00 AM– 8 36 AM Preview Abstract Abstract. We report the direct observation of a sin 2$ phi. $ component in the current- phase relation. Second- Harmonic Current- Phase Relation in Josephson. We report the observation of a current- phase relation dominated by the second Josephson harmonic in superconductor- ferromagnet- superconductor junctions. The exotic current- phase relation is realized in the vicinity of a temperature- controlled 0- to- $ ensuremath pi $ junction transition.

At which the first Josephson harmonic vanishes. Direct current- phase relation measurements. As well as Josephson interferometry. Nonvanishing supercurrent and half- integer Shapiro steps at the $ 0. Non- sinusoidal current- phase relationship in. Non- sinusoidal current- phase relationship in Josephson junctions from the 3D topological insulator HgTe Authors. Christoph Brüne.

Second- harmonic current- phase relation in. The exotic current- phase relation is realized in the vicinity of a temperature- controlled 0- to- $ π$ junction transition. As well as Josephson.