Discovery of parity-violating Majorana fermions in a chiral superconductor Sr2RuO4
Hiroyoshi Nobukane, Akiyuki Tokuno, Toyoki Matsuyama, and Satoshi, Tanda
TL;DR
This paper reports the experimental discovery of parity-violating Majorana fermions in the chiral superconductor Sr2RuO4, evidenced by anomalous voltage-current behavior and magnetic field dependence.
Contribution
It presents the first observation of parity-violating Majorana fermions in a chiral superconductor, linking edge currents and chirality changes.
Findings
Anomalous even-function voltage-current curves observed.
Majorana fermions excited along chiral edge currents.
Chirality change associated with spontaneous magnetization.
Abstract
We found parity-violating Majorana fermions in a chiral superconductor Sr2RuO4. The current-voltage curves show an anomalous behavior: The induced voltage is an even function of the bias current. The magnetic field dependent results suggest the excitation of the Majorana fermions along the closed chiral edge current of the single domain under bias current. We also discuss the relationship between a change of the chirality and spontaneous magnetization of the single domain Sr2RuO4.
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