Oral: Charge density wave suppression by Ba doping in quasi-1D Eu<sub>1-x</sub>Ba<sub>x</sub>Al<sub>4</sub> measured with x-ray diffraction

ORAL

Abstract

EuAl4 is a charge density wave (CDW) material with a high transition temperature (Tc). It exhibits a CDW along the crystallographic $c$ direction, similar to SrAl4. Doping EuAl4 with Ba suppresses the CDW, providing insight into the formation and evolution of CDWs as the electronic structure is modified by addition of mobile carriers. We conducted a systematic study of Ba-doped EuAl4 compounds using X-ray diffraction (XRD) and observed a suppression of Tc up to 40% Ba concentration. This suppression is accompanied by a monotonic increase in the CDW wave vector. I will discuss the relationship between these observations and the phase diagram determined from transport experiments.

*This work was primarily supported by the DOE Center for Quantum Sensing and Quantum Materials under Award No. DE-SC0021238. P.A. acknowledges additional support from Moore Foundation EPiQS grant GBMF9452.

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Presenters

  • Yue Su

    • University of Illinois Urbana-Champaign Champaign

Authors

  • Yue Su

    • University of Illinois Urbana-Champaign Champaign

  • Camille M Bernal-Choban

    • University of Illinois at Urbana-Champaign

  • Dipanjan Chaudhuri

    • University of Illinois at Urbana-Champaign

  • Farzaneh H Hoveyda-Marashi

    • University of Illinois Urbana-Champaign
    • University of Illinois at Urbana-Champaign

  • Prathum Saraf

    • University of Maryland College Park

  • Danila Sokratov

    • University of Maryland College Park

  • Johnpierre Paglione

    • University of Maryland College Park
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Peter Abbamonte

    • University of Illinois at Urbana-Champaign