Kondo interactions from band reconstruction in
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- High Energy Accelerator Research Organization, Ibaraki (Japan)
- RIKEN SPring-8 Center, Hyogo (Japan)
- National Institute for Materials Science, Tsukuba (Japan)
- Japan Atomic Energy Agency, Hyogo (Japan)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Connecticut, Storrs, CT (United States)
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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC00112704; AC02-06CH11357
- OSTI ID:
- 1193213
- Alternate ID(s):
- OSTI ID: 1176980
- Report Number(s):
- BNL-108004-2015-JA; PRLTAO; R&D Project: LS001
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 12; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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