A new heavy-fermion superconductor : A relative of the cuprates?

C. Petrovic; R. Movshovich; M. Jaime; P. G. Pagliuso; M. F. Hundley; J. L. Sarrao; Z. Fisk; J. D. Thompson

doi:10.1209/epl/i2001-00161-8

All issues

Volume 53 / No 3 (February 2001)

Europhys. Lett., 53 3 (2001) 354-359

Abstract

Issue		Europhys. Lett. Volume 53, Number 3, February 2001


Page(s)		354 - 359
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2001-00161-8
Published online		01 December 2003

Europhys. Lett., 53 (3), pp. 354-359 (2001)

A new heavy-fermion superconductor $\ab{CeIrIn_5}$ : A relative of the cuprates?

C. Petrovic¹^,2, R. Movshovich¹, M. Jaime¹, P. G. Pagliuso¹, M. F. Hundley¹, J. L. Sarrao¹, Z. Fisk¹^,2 and J. D. Thompson¹

¹ Condensed Matter and Thermal Physics, Los Alamos National Laboratory Los Alamos, NM 87545 USA
² National High Magnetic Field Laboratory, Florida State University Tallahassee, FL 32306 USA

Corresponding author: jdt@mst.lanl.gov

Received: 18 July 2000
Accepted: 22 November 2000

Abstract

$\ab{CeIrIn_5}$ is a member of a new family of heavy-fermion compounds and has a Sommerfeld specific-heat coefficient of $720\un{mJ/mol K^2}$ . It exhibits a bulk, thermodynamic transition to a superconducting state at $T_{\ab c}=0.40\un{K}$ , below which the specific heat decreases as T² to a small residual T-linear value. Surprisingly, the electrical resistivity drops below instrumental resolution at a much higher temperature $T_0=1.2\un{K}$ . These behaviors are highly reproducible and field-dependent studies indicate that T₀ and $T_{\ab c}$ arise from the same underlying electronic structure. The layered crystal structure of $\ab{CeIrIn_5}$ suggests a possible analogy to the cuprates in which spin/charge pair correlations develop well above $T_{\ab c}$ .

PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 74.70.Tx – Heavy-fermion superconductors

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