Observation of half-quantum flux in the unconventional superconductor β-Bi<sub>2</sub>Pd.
basic_science · Level V
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- Record sourced from PubMed, PMID 31601768.
- Also identified by DOI 10.1126/science.aau6539.
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Abstract
Magnetic flux quantization is one of the defining properties of a superconductor. We report the observation of half-integer magnetic flux quantization in mesoscopic rings of superconducting β-Bi<sub>2</sub>Pd thin films. The half-quantum fluxoid manifests itself as a π phase shift in the quantum oscillation of the superconducting critical temperature. This result verifies unconventional superconductivity of β-Bi<sub>2</sub>Pd and is consistent with a spin-triplet pairing symmetry. Our findings may have implications for flux quantum bits in the context of quantum computing.