DC Current Driven Critical Current Variation in Sr2RuO4-Ru Junction Proved by Local Transport Measurements

Details DC Current Driven Critical Current Variation in Sr2RuO4-Ru Junction Proved by Local Transport Measurements DC Current Driven Critical Current Variation in Sr2RuO4-Ru Junction Proved by Local Transport Measurements

2010-04-30

arxiv.org/abs/1004.5449v1

J. Phys. Soc. Jpn. 79 (2010) 074708

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures, Accepted for publication in J. Phys. Soc. Jpn.

Scientific paper

To search for new evidence of the chiral p-wave superconducting domain in Sr2RuO4, we investigated the unconventional local transport characteristics of a microfabricated Sr2RuO4-Ru eutectic junction. We found that the anomalous hysteresis in voltage-current characteristics [as reported in H. Kambara et al.: Phys. Rev. Lett. 101 (2008) 267003.] is strongly affected by dc currents, but not by magnetic fields. This suggests that dc current acts as a driving force to move chiral p-wave domain walls; a domain wall trapped at a pinning potential is forced to shift to the next stable position, thereby forming a larger critical current path and resulting in the anomalous hysteresis.

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