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Title: Orbital-Selective Kondo Entanglement and Antiferromagnetic Order in USb2

Journal Article · · Physical Review Letters
ORCiD logo [1];  [1];  [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [4];  [1]
  1. Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China)
  2. Inst. of Applied Physics and Computational Mathematics, Beijing (China)
  3. Shanghai Inst. of Applied Physics (China)
  4. Rice Univ., Houston, TX (United States)

In heavy-fermion compounds, the dual character of f electrons underlies their rich and often exotic properties like fragile heavy quasiparticles, a variety of magnetic orders and unconventional superconductivity. 5f-electron actinide materials provide a rich setting to elucidate the larger and outstanding issue of the competition between magnetic order and Kondo entanglement and, more generally, the interplay among different channels of interactions in correlated electron systems. Here, by using angle-resolved photoemission spectroscopy, we present the detailed electronic structure of USb2 and observe two different kinds of nearly flat bands in the antiferromagnetic state of USb2. Polarization-dependent measurements show that these electronic states are derived from 5f orbitals with different characters; in addition, further temperature-dependent measurements reveal that one of them is driven by the Kondo correlations between the 5f electrons and conduction electrons, while the other reflects the dominant role of the magnetic order. Furthermore, our results on the low-energy electronic excitations of USb2 implicate orbital selectivity as an important new ingredient for the competition between Kondo correlations and magnetic order and, by extension, in the rich landscape of quantum phases for strongly correlated f electron systems.

Research Organization:
Rice Univ., Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018197; 2017YFA0303104; TZ2016004; C-1411
OSTI ID:
1612874
Alternate ID(s):
OSTI ID: 1560732
Journal Information:
Physical Review Letters, Vol. 123, Issue 10; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (1)

Suppression of hybridization by Cd doping in CeCoIn 5 journal December 2019