Universal heat conduction in Ce1-xYbxCoIn5: Evidence for robust nodal d-wave superconducting gap

Xu, Y.; Petrovic, C.; Dong, J. K.; Lum, I. K.; Zhang, J.; Hong, X. C.; He, L. P.; Wang, K. F.; Ma, Y. C.; Maple, M. B.; Shu, L.; Li, S. Y.

doi:10.1103/PhysRevB.93.064502

Universal heat conduction in Ce_1-xYb_xCoIn₅: Evidence for robust nodal d-wave superconducting gap

Journal Article · Mon Feb 01 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.064502· OSTI ID:1245396

Xu, Y. ^[1]; Petrovic, C. ^[2]; Dong, J. K. ^[1]; Lum, I. K. ^[3]; Zhang, J. ^[1]; Hong, X. C. ^[1]; He, L. P. ^[1]; Wang, K. F. ^[2]; Ma, Y. C. ^[2]; Maple, M. B. ^[3]; Shu, L. ^[1]; Li, S. Y. ^[1]

Fudan Univ., Shanghai (People's Republic of China)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. of California, San Diego, La Jolla, CA (United States)

In the heavy-fermion superconductor Ce_1-xYb_xCoIn₅, Yb doping was reported to cause a possible change from nodal d-wave superconductivity to a fully gapped d-wave molecular superfluid of composite pairs near x ≈ 0.07 (nominal value x_nom = 0.2). Here we present systematic thermal conductivity measurements on Ce_1-xYb_xCoIn₅ (x = 0.013, 0.084, and 0.163) single crystals. The observed finite residual linear term κ₀/T is insensitive to Yb doping, verifying the universal heat conduction of the nodal d-wave superconducting gap in Ce_1-xYb_xCoIn₅. Similar universal heat conduction is also observed in the CeCo(In_1–yCd_y)₅ system. Furthermore, these results reveal a robust nodal d-wave gap in CeCoIn₅ upon Yb or Cd doping.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-98CH10886; FG02-04ER46105

OSTI ID:: 1245396

Alternate ID(s):: OSTI ID: 1236536

Report Number(s):: BNL--111990-2016-JA; KC0201050

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 6 Vol. 93; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

From Ising Resonant Fluctuations to Static Uniaxial Order in Antiferromagnetic and Weakly Superconducting CeCo ( In 1 − x Hg x ) 5 ( x = 0.01 ) Stock, C.; Rodriguez-Rivera, J. A.; Schmalzl, K. Physical Review Letters, Vol. 121, Issue 3 https://doi.org/10.1103/physrevlett.121.037003	journal	July 2018

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