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Phys. Rev. B 77, 100505(R) (2008) [4 pages]

Ambient-pressure bulk superconductivity deep in the magnetic state of CeRhIn5

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Johnpierre Paglione1,2, P.-C. Ho1,3, M. B. Maple1, M. A. Tanatar4,*, Louis Taillefer4, Y. Lee5, and C. Petrovic6
1Department of Physics, University of California at San Diego, La Jolla, California 92093, USA
2Center for Nanophysics and Advanced Materials, Department of Physics, University of Marland, College Park, Maryland 20742, USA
3Department of Physics, California State University, Fresno, California 93740, USA
4Département de Physique et RQMP, Université de Sherbrooke, Sherbrooke, Canada J1K 2R1
5Department of Earth System Sciences, Yonsei University, Seoul 120749, Korea
6Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA

Received 3 December 2007; published 10 March 2008

Specific heat, magnetic susceptibility, and electrical transport measurements were performed at ambient pressure on high quality single-crystal specimens of CeRhIn5 down to ultralow temperatures. We report signatures of an anomaly observed in all measured quantities consistent with a bulk thermodynamic phase transition to a superconducting state at Tc=110 mK. Occurring far below the onset of antiferromagnetism at TN=3.8 K, this transition appears to involve a significant portion of the available low-temperature density of electronic states, exhibiting an entropy change in line with that found in other members of the 115 family of superconductors tuned away from quantum criticality.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.100505
DOI:
10.1103/PhysRevB.77.100505
PACS:
74.70.Tx, 71.27.+a, 75.20.Hr

*Permanent address: Institute of Surface Chemistry, N.A.S. Ukraine, Kyiv, Ukraine.

 
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