Fluctuations of CDW order at a quantum phase transition

ORAL

Abstract

2H-NbSe2 is the archetypical two-dimensional charge-density-wave system. Using x-ray diffraction in a diamond anvil cell, we track the evolution of the CDW order towards the buried quantum critical point inside the superconducting phase. We observe a pressure-dependent nesting vector as well as fluctuation broadening, and compare these results to the behavior of the three-dimensional spin-density-wave system, Chromium, at its quantum critical point.

–

Authors

  • Yejun Feng

    • Argonne National Laboratory
    • Argonne National Lab

  • J. van Wezel

    • Argonne National Lab

  • S. Haravifard

    • Argonne National Lab

  • G. Srajer

    • Argonne National Lab

  • J. Mitchell

    • Argonne National Lab

  • Jiyang Wang

    • University of Chicago

  • T.F. Rosenbaum

    • University of Chicago

  • R. Jaramillo

    • Harvard University

  • Z.-A. Xu

    • Zhejiang University

  • Y. Liu

    • Penn State University