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28 March 2024
 
  » arxiv » cond-mat/0101410

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Observation of Andreev Surface Bound States in the 3-K phase Region of Sr_2RuO_4
Z. Q. Mao ; K. D. Nelson ; R. Jin ; Y. Liu ; Y. Maeno ;
Date 26 Dec 2000
Subject Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el
AbstractThe tunneling spectrum of the superconducting phase with T_c ~ 3.0 K has been measured in the Ru-embedded region of Sr_2RuO_4 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 T_c of Sr_2RuO_4 (~1.5 K), a bell-shaped ZBCP was found. This supports that there is a phase transition in the 3-K phase region near the bulk T_c.
Source arXiv, cond-mat/0101410
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