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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Functional superconductor interfaces from broken time-reversal symmetry.

P M R Brydon¹, Christian Iniotakis, Dirk Manske

¹Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany. brydon@theory.phy.tu-dresden.de

Physical Review Letters

|September 28, 2010

Summary

This summary is machine-generated.

Breaking time-reversal symmetry in triplet superconductor Josephson junctions causes magnetic instability. This leads to fractional flux quanta and an exotic Josephson state, detectable via critical current measurements.

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Area of Science:

Condensed Matter Physics
Superconductivity
Quantum Electronics

Background:

Josephson junctions are fundamental in quantum electronics.
Triplet superconductors exhibit unique quantum phenomena.
Time-reversal symmetry breaking is key to novel electronic states.

Purpose of the Study:

To investigate the consequences of time-reversal symmetry breaking in triplet superconductor Josephson junctions.
To explore the emergence of magnetic instability and exotic Josephson states.
To identify experimental signatures of these phenomena.

Main Methods:

Ginzburg-Landau analysis of free energy.
Microscopic modeling of the Josephson junction.
Analysis of critical current measurements.

Main Results:

Time-reversal symmetry breaking induces magnetic instability at the tunneling barrier.
Prediction of an exotic Josephson state characterized by fractional flux quanta.
Demonstration of the orbital pairing state's importance via complementary models.

Conclusions:

The study reveals a novel functional behavior in triplet superconductor Josephson junctions.
Fractional flux quanta and magnetic instability are key features of the predicted exotic state.
Critical current measurements can detect these predicted phenomena.