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Title: Kondo interactions from band reconstruction in YbInCu 4

Abstract

We combine resonant inelastic X-ray scattering (RIXS) and model calculations in the Kondo lattice compound YbInCu₄, a system characterized by a dramatic increase in Kondo temperature and associated valence fluctuations below a first-order valence transition at T≃42 K. In this study, the bulk-sensitive, element-specific, and valence-projected charge excitation spectra reveal an unusual quasi-gap in the Yb-derived state density which drives an instability of the electronic structure and renormalizes the low-energy effective Hamiltonian at the transition. Our results provide long-sought experimental evidence for a link between temperature-driven changes in the low-energy Kondo scale and the higher-energy electronic structure of this system.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [6];  [6];  [7]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. High Energy Accelerator Research Organization, Ibaraki (Japan)
  3. RIKEN SPring-8 Center, Hyogo (Japan)
  4. National Institute for Materials Science, Tsukuba (Japan)
  5. Japan Atomic Energy Agency, Hyogo (Japan)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Univ. of Connecticut, Storrs, CT (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1193213
Alternate Identifier(s):
OSTI ID: 1176980
Report Number(s):
BNL-108004-2015-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: LS001
Grant/Contract Number:  
SC00112704; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Jarrige, I., Kotani, A., Yamaoka, H., Tsujii, N., Ishii, K., Upton, M., Casa, D., Kim, J., Gog, T., and Hancock, J. N. Kondo interactions from band reconstruction in YbInCu4. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.126401.
Jarrige, I., Kotani, A., Yamaoka, H., Tsujii, N., Ishii, K., Upton, M., Casa, D., Kim, J., Gog, T., & Hancock, J. N. Kondo interactions from band reconstruction in YbInCu4. United States. doi:10.1103/PhysRevLett.114.126401.
Jarrige, I., Kotani, A., Yamaoka, H., Tsujii, N., Ishii, K., Upton, M., Casa, D., Kim, J., Gog, T., and Hancock, J. N. Fri . "Kondo interactions from band reconstruction in YbInCu4". United States. doi:10.1103/PhysRevLett.114.126401. https://www.osti.gov/servlets/purl/1193213.
@article{osti_1193213,
title = {Kondo interactions from band reconstruction in YbInCu4},
author = {Jarrige, I. and Kotani, A. and Yamaoka, H. and Tsujii, N. and Ishii, K. and Upton, M. and Casa, D. and Kim, J. and Gog, T. and Hancock, J. N.},
abstractNote = {We combine resonant inelastic X-ray scattering (RIXS) and model calculations in the Kondo lattice compound YbInCu₄, a system characterized by a dramatic increase in Kondo temperature and associated valence fluctuations below a first-order valence transition at T≃42 K. In this study, the bulk-sensitive, element-specific, and valence-projected charge excitation spectra reveal an unusual quasi-gap in the Yb-derived state density which drives an instability of the electronic structure and renormalizes the low-energy effective Hamiltonian at the transition. Our results provide long-sought experimental evidence for a link between temperature-driven changes in the low-energy Kondo scale and the higher-energy electronic structure of this system.},
doi = {10.1103/PhysRevLett.114.126401},
journal = {Physical Review Letters},
number = 12,
volume = 114,
place = {United States},
year = {Fri Mar 27 00:00:00 EDT 2015},
month = {Fri Mar 27 00:00:00 EDT 2015}
}

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