In-Plane Anisotropy of Upper Critical Field in Sr2RuO4

作     者：Z. Q. Mao Y. Maeno S. NishiZaki T. Akima T. Ishiguro 

作者机构：Department of Physics Kyoto University Kyoto 606-8502 Japan Core Research for Evolutional Science and Technology of Japan Science and Technology Corporation (CREST-JST) Kawaguchi Saitama 332-0012 Japan 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2000年第84卷第5期

页      面：991-991页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：.ac susceptibility in-plane Hc field misalignment line-node 

摘      要：We investigated the behavior of the spin-triplet superconductor Sr2RuO4 ( Tc≈1.5K) under the magnetic fields parallel to the quasi-two-dimensional plane. The upper critical field Hc2 exhibits a clear fourfold anisotropy of about 3% at 0.35 K. Furthermore, we detected an additional transition feature below Hc2 in both the ac susceptibility and the specific heat. These second-transition features as well as the pronounced in-plane Hc2 anisotropy disappear above 0.8 K or under intentional field misalignment of less than 1°. Most of these characteristics are consistent with the predicted emergence of the second superconducting phase with a line-node gap.