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首页> 外文期刊>Physical review >Electronic structure and H-T phase diagram of Eu(Fe_(1-x)Rh_x)_2As_2
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Electronic structure and H-T phase diagram of Eu(Fe_(1-x)Rh_x)_2As_2

机译：Eu（Fe_（1-x）Rh_x）_2As_2的电子结构和H-T相图

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摘要

The iron-based superconductors represent a promising platform for high-temperature superconductivity, but the interactions underpinning their pairing present a puzzle. The EuFe2As2 family is unique among these materials for having magnetic order which onsets within the superconducting state, just below the superconducting transition. Superconductivity and magnetic order are normally antagonistic and often vie for the same unpaired electrons, but in this family the magnetism arises from largely localized Eu moments and they coexist, with the competition between these evenly matched opponents leading to reentrant superconducting behavior. To help elucidate the physics in this family and the interactions between the magnetic order and superconductivity, we investigate the H-T phase diagram near optimal Rh doping through specific heat, resistivity, and magnetization measurements, and study the electronic structure by angular-resolved photoemission spectroscopy. The competition between the Eu and FeAs layers may offer a route to directly access the electronic structure under effective magnetic fields via angle-resolved photoemission spectroscopy, which is ordinarily a strictly zero-field technique.
机译：铁基超导体代表了高温超导性的有前途的平台，但构成它们配对的相互作用却是一个难题。在这些材料中，EuFe2As2家族具有独特的磁性顺序，该磁性顺序在超导状态下刚好在超导转变以下发生。超导性和磁态通常是拮抗性的，并且经常争夺相同的未配对电子，但是在这个家族中，磁化主要来自局部的Eu矩，它们共存，并且这些均等匹配的对手之间的竞争导致了可重入的超导行为。为了帮助阐明该族的物理学以及磁序和超导之间的相互作用，我们通过比热，电阻率和磁化测量研究了最佳Rh掺杂附近的H-T相图，并通过角分辨光发射光谱研究了电子结构。 Eu和FeAs层之间的竞争可能会提供一种途径，该途径可通过角度分辨光发射光谱法在有效磁场下直接进入电子结构，这通常是严格的零场技术。

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  • 来源
    《Physical review》 |2019年第5期|054510.1-054510.9|共9页
  • 作者

    Xiao Shaozhu; Peets Darren C.; Liu Wei; Zhang Shiju; Feng Ya; Jiao Wen-He; Cao Guang-Han; Schwier Eike F.; Shimada Kenya; Li Cong; Zhou Xingjiang; He Shaolong;

  • 作者单位

    Chinese Acad Sci Ningbo Inst Mat Technol & Engn Ningbo 315201 Zhejiang Peoples R China;

    Zhejiang Univ Sci & Technol Dept Phys Hangzhou 310023 Zhejiang Peoples R China;

    Zhejiang Univ Dept Phys Hangzhou 310027 Zhejiang Peoples R China|Collaborat Innovat Ctr Adv Microstruct Nanjing 210093 Jiangsu Peoples R China;

    Hiroshima Univ Hiroshima Synchrotron Radiat Ctr Higashihiroshima 7390046 Japan;

    Chinese Acad Sci Inst Phys Natl Lab Superconduct Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China;

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