Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1–xYbxCoIn5

Song, Yu; Van Dyke, John; Lum, I. K.; White, B. D.; Jang, Sooyoung; Yazici, Duygu; Shu, L.; Schneidewind, A.; Čermák, Petr; Qiu, Y.; Maple, M. B.; Morr, Dirk K.; Dai, Pengcheng

doi:10.1038/ncomms12774

Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce_1–xYb_xCoIn₅

Journal Article · Wed Sep 28 00:00:00 EDT 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms12774· OSTI ID:1360139

Song, Yu ^[1]; Van Dyke, John ^[2]; Lum, I. K. ^[3]; White, B. D. ^[3]; Jang, Sooyoung ^[3]; Yazici, Duygu ^[3]; Shu, L. ^[4]; ^[5]; Čermák, Petr ^[5]; Qiu, Y. ^[6]; Maple, M. B. ^[3]; Morr, Dirk K. ^[2]; ^[7]

Rice Univ., Houston, TX (United States); Rice University
Univ. of Illinois, Chicago, IL (United States)
Univ. of California, San Diego, La Jolla, CA (United States)
Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
Forschungszentrum Julich GmbH, Garching (Germany)
National Institute of Standard and Technology, Gaithersburg, MD (United States)
Rice Univ., Houston, TX (United States)

Here, the neutron spin resonance is a collective magnetic excitation that appears in copper oxide, iron pnictide, and heavy fermion unconventional superconductors. Although the resonance is commonly associated with a spin-exciton due to the d(s^±)-wave symmetry of the superconducting order parameter, it has also been proposed to be a magnon-like excitation appearing in the superconducting state. Here we use inelastic neutron scattering to demonstrate that the resonance in the heavy fermion superconductor Ce_1–xYb_xCoIn₅ with x=0,0.05,0.3 has a ring-like upward dispersion that is robust against Yb-doping. By comparing our experimental data with random phase approximation calculation using the electronic structure and the momentum dependence of the d_x²_–y²-wave superconducting gap determined from scanning tunneling microscopy for CeCoIn₅, we conclude the robust upward dispersing resonance mode in Ce_1–xYb_xCoIn₅ is inconsistent with the downward dispersion predicted within the spin-exciton scenari

View Accepted Manuscript (DOE)

Research Organization:: Rice Univ., Houston, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0012311

OSTI ID:: 1360139

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 7; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Nodal to Nodeless Superconducting Energy-Gap Structure Change Concomitant with Fermi-Surface Reconstruction in the Heavy-Fermion Compound CeCoIn 5 Kim, Hyunsoo; Tanatar, M. A.; Flint, R. Physical Review Letters, Vol. 114, Issue 2 https://doi.org/10.1103/physrevlett.114.027003	journal	January 2015
Single to Multiquasiparticle Excitations in the Itinerant Helical Magnet CeRhIn 5 Stock, C.; Rodriguez-Rivera, J. A.; Schmalzl, K. Physical Review Letters, Vol. 114, Issue 24 https://doi.org/10.1103/physrevlett.114.247005	journal	June 2015
Ising Incommensurate Spin Resonance of CeCoIn 5 : A Dynamical Precursor of the Q Phase Raymond, S.; Lapertot, G. Physical Review Letters, Vol. 115, Issue 3 https://doi.org/10.1103/physrevlett.115.037001	journal	July 2015
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The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors Eschrig, Matthias arXiv https://doi.org/10.48550/arxiv.cond-mat/0510286	text	January 2005

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43 PARTICLE ACCELERATORS
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