Observation of Andreev Surface Bound States in the 3-K Phase Region of Sr2RuO4

作     者：Z. Q. Mao K. D. Nelson R. Jin Y. Liu Y. Maeno 

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

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

年 卷 期：2001年第87卷第3期

页      面：037003-037003页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Directorate for Mathematical and Physical Sciences, MPS, (9974327) Directorate for Mathematical and Physical Sciences, MPS 

主　　题：Superconductivity 

摘      要：The tunneling spectrum of the superconducting phase with Tc≃3.0K has been measured in the Ru-embedded region of Sr2RuO4 using cleaved junctions. A sharp zero-bias conductance peak (ZBCP) has been observed below 3 K. All characteristics of this ZBCP suggest that it originates from Andreev surface bound states, indicating that the pairing in the 3-K phase is also non- s-wave. Below the bulk Tc of Sr2RuO4 (≃1.5K), a crossover from sharp to bell-shaped ZBCP was found. This supports the theory that there is a phase transition in the 3-K phase region near the bulk Tc.