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Evolution of the Kondo lattice electronic structure above the transport coherence temperature

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [1];  [2];  [3];  [4];  [5];  [5];  [6]
  1. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
  2. Department of Physics, Randall Laboratory, University of Michigan, Ann Arbor, MI 48109,
  3. National High Magnet Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 84745,
  4. Department of Physics, University of California San Diego, La Jolla, CA 92903,
  5. Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea,
  6. Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea,, Division of Advanced Nuclear Engineering, POSTECH, Pohang 37673, Korea
Significance

The temperature ( T )-dependent evolution of the Kondo lattice electronic structure is a long-standing topic of theoretical and experimental investigation, still lacking a truly microscopic theory that agrees with a full experimental characterization. Here multiple characteristic T scales of the interaction of localized f moments with conduction electrons in the Kondo lattice CeCo I n 5 are identified and investigated using angle-resolved photoemission measurements that substantiate dynamical mean-field theory which newly includes the full realism of crystalline electric-field (CEF) f splittings. Thereby errors in the itinerant versus localized f -state classification from standard density functional theory are corrected, microscopic insight into the broad T -range crossover of f -hybridization effects is gained, and a prediction of CEF degeneracy crossover below the lattice coherence T is made.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
89233218CNA000001; AC02-05CH11231; FG02-04ER46105; FG02-07ER46379
OSTI ID:
1658389
Alternate ID(s):
OSTI ID: 1829645
Report Number(s):
LA-UR--20-29086
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 38 Vol. 117; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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