Electronic inhomogeneity in heavy Fermions

ORAL

Abstract

The experimentally determined superconducting condensation energy of La-doped CeCoIn$_{5}$ is interpreted to show that the superconducting fraction decreases linearly with La concentration, consistent with the measured residual normal fraction seen in the electronic specific gamma remaining in the superconducting state as T $\to $ 0K. The In NQR data is also discussed. Our result points to an electronically inhomogeneous state that appears to be common to doped heavy Fermion materials near a quantum critical point.

–

Authors

  • Zachary Fisk

    University of California, Irvine, Department of Physics and Astromony, University of California, Irvine, Irvine, CA 92697, Department of Physics, University of California, Irvine

  • Eric Bauer

    Los Alamos Natl. Lab., NM, USA, Los Alamos National Lab, MPA-CMMS, Los Alamos Nat. Lab., MPA-CMMS, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545

  • Yi-feng Yang

    Los Alamos National Laboratory, Los Alamos, NM 87545

  • Cigdem Capan

    Physics and Astronomy, Washington State University, PO Box 642814, Pullman, WA 99164-2814

  • Filip Ronning

    Los Alamos National Laboratory, MPA-10, Los Alamos National Laboratory, Los Alamos National Lab, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, NM 87545

  • Joe Thompson

    Los Alamos National Laboratory, Los Alamos Nat. Lab., Los Alamos National Laboratory, Los Alamos, NM 87545

  • Roman Movshovich

    Los Alamos National Laboratory, Los Alamos, NM 87545

  • Andrea Bianchi

    Department de Physique, Universite de Montreal, Montreal H3C 3J7

  • Ricardo Urbano

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306

  • Hironori Sakai

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibarakai 319-1195