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Shu L, Baumbach RE, Janoschek M, et al. Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations. Phys Rev Lett. 2011;106(15):156403doi: 10.1103/PhysRevLett.106.156403.
Shu, L., Baumbach, R. E., Janoschek, M., Gonzales, E., Huang, K., Sayles, T. A., Paglione, J., O'Brien, J., Hamlin, J. J., Zocco, D. A., Ho, P. C., McElroy, C. A., & Maple, M. B. (2011). Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations. Physical review letters, 106(15), 156403. https://doi.org/10.1103/PhysRevLett.106.156403
Shu, L, et al. "Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations." Physical review letters vol. 106,15 (2011): 156403. doi: https://doi.org/10.1103/PhysRevLett.106.156403
Shu L, Baumbach RE, Janoschek M, Gonzales E, Huang K, Sayles TA, Paglione J, O'Brien J, Hamlin JJ, Zocco DA, Ho PC, McElroy CA, Maple MB. Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations. Phys Rev Lett. 2011 Apr 15;106(15):156403. doi: 10.1103/PhysRevLett.106.156403. Epub 2011 Apr 13. PMID: 21568584.
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Phys Rev Lett. 2011 Apr 15;106(15):156403. doi: 10.1103/PhysRevLett.106.156403. Epub 2011 Apr 13.

Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations.

Physical review letters

L Shu, R E Baumbach, M Janoschek, E Gonzales, K Huang, T A Sayles, J Paglione, J O'Brien, J J Hamlin, D A Zocco, P-C Ho, C A McElroy, M B Maple

Affiliations

  1. Department of Physics, University of California, San Diego, La Jolla, California 92093, USA.

PMID: 21568584 DOI: 10.1103/PhysRevLett.106.156403

Abstract

X-ray diffraction, electrical resistivity, magnetic susceptibility, and specific heat measurements on Ce(1-x)Yb(x)CoIn5 (0≤x≤1) reveal that many of the characteristic features of the x=0 correlated electron state are stable for x≤0.775 and that phase separation occurs for x>0.775. The stability of the correlated electron state is apparently due to cooperative behavior of the Ce and Yb ions, involving their unstable valences. Low-temperature non-Fermi liquid behavior is observed and varies with x, even though there is no readily identifiable quantum critical point. The superconducting critical temperature T(c) decreases linearly with x towards 0 K as x→1, in contrast with other HF superconductors where T(c) scales with T(coh).

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