Nematic fluctuations in iron-based superconductors BaFe<sub>2</sub>(As<sub>1-x</sub>P<sub>x</sub>)<sub>2</sub>

ORAL

Abstract

Nematicity is a many-body quantum phase that breaks rotational symmetry while preserving translational symmetry. It has been discovered in the phase diagrams of both iron-based and cuprate high-temperature superconductors [1-3]. In the iron-based superconductors, the optimal doping of the superconducting phase coincides with the putative nematic quantum critical point, suggesting the possibility of superconducting pairing enhanced by nematic quantum fluctuations [2,4]. However, a comprehensive study of the nematic fluctuations is still absent in the BaFe2(As1-xPx)2, which exhibits the cleanest signature of quantum criticality among all the iron-based superconductors. In this talk, I will present a detailed study of the nematic fluctuations of BaFe2(As1-xPx)2 using the elastoresistivity measurement. I will also present the study of strain dependence of superconducting Tc, which shed light on the intricate relations between nematicity and superconductivity.

Reference:
[1] J.-H. Chu, et. al., Science 329, 824 (2010)
[2] J.-H. Chu, et. al., Science 337, 710 (2012)
[3] Y. Sato, et. al., Nat. Phy. 13, 1074 (2017)
[4] H.-H. Kuo, et. al., Science 352, 958 (2016)

*the David and Lucile Packard Foundation

–

Presenters

  • Zhaoyu Liu

    • University of Washington

Authors

  • Zhaoyu Liu

    • University of Washington

  • Qianni Jiang

    • University of Washington
    • Department of Physics, University of Washington
    • Physics, University of Washington

  • Yue Shi

    • University of Washington

  • Zaiyao Fei

    • Department of Physics, University of Washington
    • University of Washington

  • Paul Malinowski

    • University of Washington

  • Joshua Sanchez

    • University of Washington

  • Joshua Mutch

    • University of Washington

  • Philip James Ryan

    • X-ray Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Jong-Woo Kim

    • Argonne National Laboratory
    • APS, Argonne National Laboratory

  • Xiaodong Xu

    • Physics, University of Washington
    • Department of Physics, University of Washington
    • University of Washington
    • Department of Physics, University of Washington, Seattle
    • University of Washington, Seattle

  • Jiun-Haw Chu

    • University of Washington
    • Department of Physics, University of Washington, Seattle
    • Department of Physics, University of Washington
    • Physics, University of Washington