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Title: Coherence temperature in the diluted periodic Anderson model

Journal Article · · Physical Review B
 [1];  [2];  [1];  [3];  [1];  [3]
  1. Universidade Federal do Rio de Janeiro (Brazil)
  2. The Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)
  3. Univ. of California, Davis, CA (United States)

The Kondo and periodic Anderson model (PAM) are known to provide a microscopic picture of many of the fundamental properties of heavy-fermion materials and, more generally, a variety of strong correlation phenomena in 4f and 5f systems. Here, we apply the determinant quantum Monte Carlo method to include disorder in the PAM, specifically the removal of a fraction x of the localized orbitals. We determine the evolution of the coherence temperature T*, where the local moments and conduction electrons become entwined in a heavy-fermion fluid, with x and with the hybridization V between localized and conduction orbitals. We recover several of the principal observed trends in T* of doped heavy fermions, and we also show that, within this theoretical framework, the calculated nuclear magnetic resonance relaxation rate tracks the experimentally measured behavior in pure and doped CeCoIn5. Finally, our results contribute to important issues in the interpretation of local probes of disordered, strongly correlated systems.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); USDOE
Grant/Contract Number:
SC0014671; DMR-1807889; DMR-1005393
OSTI ID:
1597036
Alternate ID(s):
OSTI ID: 1511770
Journal Information:
Physical Review B, Vol. 99, Issue 19; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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