Observation of half-quantum flux in the unconventional superconductor β-Bi2Pd
Observation of half-quantum flux in the unconventional superconductor β-Bi2Pd
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DOI：
10.1126/science.aau6539
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发表时间：
2019-10-11
期刊：
影响因子：
56.9
通讯作者：
Chien, C. L.
中科院分区：
文献类型：
--
作者：
Li, Yufan;Xu, Xiaoying;Chien, C. L.
磁通量量子化是超导体的定义性质之一。本文报道了在β-Bi_2 Pd超导薄膜介观环中观测到的半整数磁通量子化现象。半量子磁通量本身表现为超导临界温度的量子振荡中的π相移。这一结果证实了β-Bi 2 Pd的非常规超导电性，并与自旋三重态配对对称性一致。我们的发现可能对量子计算背景下的通量量子比特有影响。
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 beta-Bi2Pd thin films. The half-quantum fluxoid manifests itself as a pi phase shift in the quantum oscillation of the superconducting critical temperature. This result verifies unconventional superconductivity of beta-Bi2Pd and is consistent with a spin-triplet pairing symmetry. Our findings may have implications for flux quantum bits in the context of quantum computing.