Superconductivity in a Magnetic Rashba Semimetal EuAuBi
Superconductivity in a Magnetic Rashba Semimetal EuAuBi
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DOI：
10.7566/jpsj.92.013701
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发表时间：
2022-12
影响因子：
1.7
通讯作者：
Hidefumi Takahashi;K. Akiba;Masayuki Takahashi;A. H. Mayo;M. Ochi;Tatsuo C. Kobayashi;S. Ishiwata
中科院分区：
文献类型：
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作者：
Hidefumi Takahashi;K. Akiba;Masayuki Takahashi;A. H. Mayo;M. Ochi;Tatsuo C. Kobayashi;S. Ishiwata
我们报道了在层状极性半金属EuAuBi中观察到的具有多重磁有序和Rashba型自旋轨道耦合的超导电性。在4 K下观察到磁性转变，随后在2.2 K下观察到超导转变，这对晶体表面条件敏感。面外场的上临界场Hc2为9.8T，是面内场的3倍，这可能与二维结构或表面态有关.基于第一性原理计算，发现特征Hc2可能反映了Eu磁矩增强的Rashba型自旋分裂和Zeeman自旋分裂的有效结合对费米面的各向异性修正.的
We report the observation of superconductivity with multiple magnetic ordering and Rashba-type spin-orbit coupling in a layered polar semimetal EuAuBi. Magnetic transition is observed at 4 K, followed by a superconducting transition at 2.2 K, which is sensitive to the crystal surface conditions. The upper critical field H c2 of 9.8 T for the out-of-plane field is three times higher than that for the in-plane field, which can be associated with the two-dimensional structure or the surface state. On the basis of first-principles calculations, it is found that the characteristic H c2 possibly reflects the anisotropic modification of the Fermi surface by the effective combination of Rashba-type spin splitting and Zeeman spin splitting enhanced by Eu moments. The