APS Logo

Charge Order in Tunable Electronic Nematic Superconductor Ba1-xSrxNi2As2

ORAL

Abstract

Recent discoveries of charge order in the cuprates and electron nematic order in the iron-based superconductors has pointed towards the possibilities of both orderings being tied to mechanisms of high Tc superconductivity.The Ba(1-x)Sr(x)Ni2As2 system, closely related to the BaFe2As2 system, has recently been shown to exhibit both types of ordering without the presence of any magnetic order. We report single crystal X-ray diffraction observations that show a unidirectional charge order with wavevector (0.27,0,0) in BaNi2As2 decays and vanishes by x=0.65. We also show that the (0.33,0,0) CDW in the triclinic phase evolves into a (0.5,0,0) CDW by x=0.65. The evolution of the charge order in this system correlates well with the reported evolution of nematicity and superconducivity, suggesting a strong link between the three phases.

–

Presenters

  • John Collini

    University of Maryland, College Park, Department of Physics, University of Maryland, College Park

Authors

  • John Collini

    University of Maryland, College Park, Department of Physics, University of Maryland, College Park

  • Sangjun Lee

    University of Illinois,Urbana Champaign, Department of Physics, Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, University of Illinois Urbana Champaign, University of Illinois at Urbana-Champaign

  • Stella Sun

    University of Illinois,Urbana Champaign, Department of Physics, Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign

  • Chris Eckberg

    University of Maryland, College Park, Physics Department, University of Maryland

  • Jeffrey Lynn

    NIST Center for Neutron Research, National Institute of Standards and Technology, NIST, Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, NIST Center for Neutron Research

  • Peter Abbamonte

    University of Illinois at Urbana-Champaign, University of Illinois,Urbana Champaign

  • Johnpierre Paglione

    University of Maryland, College Park, Physics Department, University of Maryland, Maryland Quantum Materials Center, Department of Physics, University of Maryland College Park, Department of Physics, University of Maryland, College Park, University of Maryland, College Park & NIST, Univ of Maryland-Colege Park, Center for Quantum Materials, University of Maryland, Maryland Quantum Materials Center, Department of Physics, University of Maryland-College Park,College Park, Maryland 20742