TY - JOUR
T1 - Superconductivity in a Magnetic Rashba Semimetal EuAuBi
AU - Takahashi, Hidefumi
AU - Akiba, Kazuto
AU - Takahashi, Masayuki
AU - Mayo, Alex H.
AU - Ochi, Masayuki
AU - Kobayashi, Tatsuo C.
AU - Ishiwata, Shintaro
N1 - Funding Information:
Acknowledgements The authors thank S. Fujimoto, T. Mizushima, and K. Aoyama for fruitful discussions. This study was supported in part by KAKENHI (Grant Nos. 19K14660, 20K03802, 21H01042, 21H01030, 22H00343), the Asahi Glass Foundation, the Murata Foundation, and Research Foundation for the Electrotechnology of Chubu.
Publisher Copyright:
© 2023 Society The Author.
PY - 2023/1/15
Y1 - 2023/1/15
N2 - 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 Hc2 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 Hc2 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.
AB - 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 Hc2 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 Hc2 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.
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U2 - 10.7566/JPSJ.92.013701
DO - 10.7566/JPSJ.92.013701
M3 - Article
AN - SCOPUS:85145478062
SN - 0031-9015
VL - 92
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 1
M1 - 013701
ER -