TY - JOUR
T1 - Investigation of in-plane anisotropy of c-axis magnetoresistance for BiCh2-based layered superconductor NdO0.7F0.3BiS2
AU - Hoshi, Kazuhisa
AU - Sudo, Kenta
AU - Goto, Yosuke
AU - Kimata, Motoi
AU - Mizuguchi, Yoshikazu
N1 - Funding Information:
Acknowledgments The authors thank O. Miura for support with the experiments. This work was partly supported by Collaborative Research with IMR, Tohoku Univ. (proposal number: 18H0006, 19H0023), Grants-in-Aid for Scientific Research (Nos. 15H05886, 16H04493, 18KK0076, and 19K15291) and Tokyo Metropolitan Government Advanced Research (H31-1). ORCID iDs Yosuke Goto https://orcid.org/0000-0002-2913-2897
Publisher Copyright:
© 2021 The Japan Society of Applied Physics
PY - 2021/2
Y1 - 2021/2
N2 - We investigated the in-plane anisotropy of the c-axis magnetoresistance (MR) in both superconducting and normal states of the single crystals of a BiCh2-based (Ch: chalcogen) superconductor NdO0.7F0.3BiS2. In the superconducting states of NdO0.7F0.3BiS2, four-fold-symmetric in-plane anisotropy of the c-axis MR was dominant below the superconducting transition temperature. Since the crystal structure of NdO0.7F0.3BiS2 is tetragonal, the rotational symmetry in the superconducting state is preserved in the present compound. This result is clearly different from the cases in LaO0.5F0.5BiSSe single crystals, where the in-plane MR in the superconducting state showed clear two-fold symmetry such as nematic superconductivity. These differences between four-fold and two-fold symmetry in superconducting states could be attributed to constituent elements in the conducting layer (with or without Se). Therefore, the present results propose that switching from nematic to non-nematic superconductivity states could be achieved in the BiCh2-based system. The normal-state in-plane anisotropy was also investigated for NdO0.7F0.3BiS2
AB - We investigated the in-plane anisotropy of the c-axis magnetoresistance (MR) in both superconducting and normal states of the single crystals of a BiCh2-based (Ch: chalcogen) superconductor NdO0.7F0.3BiS2. In the superconducting states of NdO0.7F0.3BiS2, four-fold-symmetric in-plane anisotropy of the c-axis MR was dominant below the superconducting transition temperature. Since the crystal structure of NdO0.7F0.3BiS2 is tetragonal, the rotational symmetry in the superconducting state is preserved in the present compound. This result is clearly different from the cases in LaO0.5F0.5BiSSe single crystals, where the in-plane MR in the superconducting state showed clear two-fold symmetry such as nematic superconductivity. These differences between four-fold and two-fold symmetry in superconducting states could be attributed to constituent elements in the conducting layer (with or without Se). Therefore, the present results propose that switching from nematic to non-nematic superconductivity states could be achieved in the BiCh2-based system. The normal-state in-plane anisotropy was also investigated for NdO0.7F0.3BiS2
UR - http://www.scopus.com/inward/record.url?scp=85100375736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100375736&partnerID=8YFLogxK
U2 - 10.35848/1347-4065/abdc33
DO - 10.35848/1347-4065/abdc33
M3 - Article
AN - SCOPUS:85100375736
VL - 60
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2
M1 - 020907
ER -