TY - JOUR
T1 - Superconductivity in hexagonal BaPtAs
T2 - SrPtSb- and YPtAs-type structures with ordered honeycomb network
AU - Kudo, Kazutaka
AU - Takeuchi, Takaaki
AU - Ota, Hiromi
AU - Saito, Yuki
AU - Ayukawa, Shin Ya
AU - Fujimura, Kazunori
AU - Nohara, Minoru
N1 - Funding Information:
Acknowledgments The authors are grateful to Seiichiro Onari and Jun Goryo for their valuable discussions, and to Naoki Nishimoto, Satoshi Ioka, and Hikaru Hiiragi for their help in the experiments. This work was partially supported by Grants-in-Aid for Scientific Research (15H05886 and 16K05451) provided by the Japan Society for the Promotion of Science (JSPS) and the Program for Advancing Strategic International Networks to Accelerate the Circulation of Talented Researchers (R2705) from JSPS.
Publisher Copyright:
©2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - The crystal structure and superconductivity of hexagonal BaPtAs are reported. Single-crystal X-ray diffraction, magnetization, electrical resistivity, and specific heat measurements were performed in this study. Two hexagonal structures with different PtAs honeycomb network stacking sequences, namely, SrPtSb- (space group P6m2, D13 h, No. 187) and YPtAs-type (P63=mmc, D46 h, No. 194) structures, were identified and found to exhibit superconductivity at 2.8 and 2.1-3.0 K, respectively. In contrast, the cubic LaIrSi-type structure (P213, T 4, No. 198) did not exhibit superconductivity above 0.1 K. BaPtAs provides a unique opportunity to study superconductivity with broken and preserved spatial inversion symmetry.
AB - The crystal structure and superconductivity of hexagonal BaPtAs are reported. Single-crystal X-ray diffraction, magnetization, electrical resistivity, and specific heat measurements were performed in this study. Two hexagonal structures with different PtAs honeycomb network stacking sequences, namely, SrPtSb- (space group P6m2, D13 h, No. 187) and YPtAs-type (P63=mmc, D46 h, No. 194) structures, were identified and found to exhibit superconductivity at 2.8 and 2.1-3.0 K, respectively. In contrast, the cubic LaIrSi-type structure (P213, T 4, No. 198) did not exhibit superconductivity above 0.1 K. BaPtAs provides a unique opportunity to study superconductivity with broken and preserved spatial inversion symmetry.
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U2 - 10.7566/JPSJ.87.073708
DO - 10.7566/JPSJ.87.073708
M3 - Article
AN - SCOPUS:85049630298
SN - 0031-9015
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 7
M1 - 073708
ER -