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Title: Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce 1–xYb xCoIn 5

Abstract

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 xCoIn 5 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 CeCoIn 5, we conclude the robust upward dispersing resonance mode in Ce 1–xYb xCoIn 5 is inconsistent with the downward dispersion predicted within the spin-exciton scenari

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [4]; ORCiD logo [5];  [5];  [6];  [3];  [2]; ORCiD logo [1]
  1. Rice Univ., Houston, TX (United States)
  2. Univ. of Illinois, Chicago, IL (United States)
  3. Univ. of California, San Diego, La Jolla, CA (United States)
  4. Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
  5. Forschungszentrum Julich GmbH, Garching (Germany)
  6. National Institute of Standard and Technology, Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1360139
Grant/Contract Number:  
SC0012311
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; electronic properties and materials; superconducting properties and materials

Citation Formats

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., and Dai, Pengcheng. Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1–xYbxCoIn5. United States: N. p., 2016. Web. doi:10.1038/ncomms12774.
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. Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1–xYbxCoIn5. United States. doi:10.1038/ncomms12774.
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., and Dai, Pengcheng. Wed . "Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1–xYbxCoIn5". United States. doi:10.1038/ncomms12774. https://www.osti.gov/servlets/purl/1360139.
@article{osti_1360139,
title = {Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1–xYbxCoIn5},
author = {Song, Yu and Van Dyke, John and Lum, I. K. and White, B. D. and Jang, Sooyoung and Yazici, Duygu and Shu, L. and Schneidewind, A. and Čermák, Petr and Qiu, Y. and Maple, M. B. and Morr, Dirk K. and Dai, Pengcheng},
abstractNote = {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 Ce1–xYbxCoIn5 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 dx2–y2-wave superconducting gap determined from scanning tunneling microscopy for CeCoIn5, we conclude the robust upward dispersing resonance mode in Ce1–xYbxCoIn5 is inconsistent with the downward dispersion predicted within the spin-exciton scenari},
doi = {10.1038/ncomms12774},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {Wed Sep 28 00:00:00 EDT 2016},
month = {Wed Sep 28 00:00:00 EDT 2016}
}

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