Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session M63: Heavy Fermions II
8:00 AM–10:48 AM,
Wednesday, March 16, 2022
Room: Hyatt Regency Hotel -Grant Park A
Sponsoring
Unit:
DCMP
Chair: John Singleton, NHMFL/ LANL
Abstract: M63.00006 : Examination of the hybridization gap in CeTX heavy-fermion compounds*
9:00 AM–9:12 AM
Presenter:
Thomas U Boehm
(Los Alamos National Laboratory)
Authors:
Thomas U Boehm
(Los Alamos National Laboratory)
Rohit P Prasankumar
(Los Alamos Natl Lab)
Yu Liu
(Los Alamos Natl Lab)
Eric D Bauer
(Los Alamos Natl Lab)
Filip Ronning
(Los Alamos Natl Lab)
temperatures, which dictates the ground state properties of the system. The CeTX series of compounds
(T = transition metal, X = p-block element) in the ZrNiAl structure type have a variety of interesting ground
states. The Ce atoms sit on a distorted kagome lattice. CePdAl illustrates frustrated magnetism, and is a
candidate quantum spin liquid. CeIrSn and CeRhSn are mixed valent metals with large Kondo
temperatures, yet are in close proximity to a quantum critical point with strong Ising anisotropy at low
temperatures. A direct and quantitative probe of the hybridization gap generated by the c-f
hybridization is provided by infrared absorption experiments. Here we present our results from
temperature dependent Fourier-transformed infrared reflection spectroscopic measurements on a series of CeTX
compounds to study the evolution of the conduction band renormalization as a function of the strength
of the c-f hybridization.
*U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
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