NMR Evidence of anisotropic Kondo liquid behavior in CeIrIn${}_5$

Abstract

We report detailed Knight shift measurements of the two indium sites in the heavy fermion compound CeIrIn${}_5$ as a function of temperature and field orientation. We find that the Knight shift anomaly is orientation-dependent, with a crossover temperature $T^{\ast }$ that varies by 50% as the field is rotated from (001) to (100). This result suggests that the hybridization between the Ce 4f states and the itinerant conduction electrons is anisotropic, a result that reflects its collective origin, and may lead to anisotropic Kondo liquid behavior and unconventional superconductivity.

7 pages, 7 figures

References in corpus (8)

• Quantum criticality
• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Modelling the Localized to Itinerant Electronic Transition in the Heavy Fermion System CeIrIn5
• Universal Behavior in Heavy Electron Materials
• Crystal-field and Kondo scale investigation of CeMIn5 (M=Co, Ir and Rh): a combined x-ray absorption and inelastic neutron study
• Disorder in a Quantum Critical Superconductor
• Long range order and two-fluid behavior in heavy electron materials
• Universal Knight shift anomaly in the Periodic Anderson model

Cited by in corpus (1)

• Hyperfine Couplings as a Probe of Orbital Anisotropy in Heavy Fermion Materials