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首页> 外文期刊>Physical review >Uniaxial c-axis pressure effects on the underdoped superconductor BaFe_2(As_(0.72)P_(0.28))_2
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Uniaxial c-axis pressure effects on the underdoped superconductor BaFe_2(As_(0.72)P_(0.28))_2

机译：Uniarxial C轴压力效应于底拆器超导体Bafe_2（AS_（0.72）P_（0.28））_ 2

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摘要

The optimal superconductivity (T_c ≈ 30 K) in BaFe_2(As_(1-x) P_x)_2 can be reached when the coupled antiferromagnetic (AF) order (T_N) and orthorhombic lattice distortion (T_s) are suppressed to zero temperature with increasing of P concentration or hydrostatic pressure. Here we use transport and neutron scattering to study the r-axis pressure effects on electronic phases in underdoped BaFe_2(As_(0.72) P_(0.28))_2. which has T_N = T_s 40 K and T_c ≈ 28 K at zero pressure. With increasing c-axis pressure, T_N and T_s are slightly enhanced around P_c ～ 20 MPa. Upon further increasing pressure, AF order is gradually suppressed to zero, while T_c is enhanced to 30 K. Our results reveal the importance of magnetoelastic couplings in BaFe_2(As_(1-x)P_x)_2, suggesting that the c-axis pressure can be used as a tuning parameter to manipulate the electronic phases in iron pnictides.
机译：当耦合的反铁磁（AF）顺序（T_N）和正交格晶格失真（T_S）抑制到零温度时，可以达到BAFE_2（AS_（AS_（AS_（AS_（1-X）P_X）_2中的最佳超导（AS_（1-x）p_x）_2。 P浓度或静水压力。在这里，我们使用运输和中子散射来研究逆型Bafe_2（AS_（0.72）P_（0.28））_ 2中的电子阶段对r轴压力影响。其在零压力下具有T_N = T_S 40 K和T_C≈28K。随着C轴压力的增加，T_N和T_S围绕P_C〜20 MPa略微增强。在进一步增加压力时，AF顺序逐渐抑制到零，而T_C增强至30 K.我们的结果揭示了Bafe_2（AS_（1-x）P_X）_2中磁弹性耦合的重要性，表明C轴压力可以用作调谐参数，以操纵铁导液中的电子阶段。

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  • 来源
    《Physical review》 |2020年第2期|020507.1-020507.5|共5页
  • 作者

    Ding Hu; David W. Tarn; Wenliang Zhang; Yuan Wei; Robert Georgii; Bjoern Pedersen; Alfonso Chacon Roldan; Pengcheng Dai;

  • 作者单位

    Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Beijing 100875 China Department of Physics and Astronomy Rice University Houston Texas 77005-1827 USA;

    Department of Physics and Astronomy Rice University Houston Texas 77005-1827 USA;

    Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China;

    Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China;

    Heinz Maier-Leibnitz Zentrum Technische Universitdt Muenchen D-85748 Garching Germany;

    Heinz Maier-Leibnitz Zentrum Technische Universitdt Muenchen D-85748 Garching Germany;

    Phvsik-Department Technische Universitdt Muenchen D-85748 Garching Germany;

    Department of Physics and Astronomy Rice University Houston Texas 77005-1827 USA Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Beijing 100875 China;

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