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.
*NSF-DMR-0801253
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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
