Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session A30: Heavy Fermions I
8:00 AM–10:48 AM,
Monday, March 6, 2023
Room: Room 222/223
Sponsoring
Unit:
DCMP
Chair: Michael Smith, Argonne National Lab
Abstract: A30.00007 : Effects of Ge doping in Yb2Si2Al, a mixed valence Shastry-Sutherland Lattice compound
9:12 AM–9:24 AM
Presenter:
Liam J Scanlon
(University of Kentucky)
Authors:
Liam J Scanlon
(University of Kentucky)
Brennan J Arnold
(Department of Physics and Astronomy, University of Kentucky)
Sean R Parkin
(Department of Chemistry, University of Kentucky)
William J Gannon
(Department of Physics and Astronomy, University of Kentucky)
We synthesized several compositions of, Yb2 Si2-xGexAl and measured structural parameters, magnetic susceptibility χ, and specific heat C as functions of temperature. Single crystal x-ray diffraction shows correlation between doping, lattice constants, and atomic positions. Measurements of χ indicate a paramagnetic ground state is favored at large Ge concentrations, while C suggests correlation between Ge concentration and the splitting of the SSL singlet and triplet states. Taken together, our results indicate a connection between frustration in the SSL planes and Ge concentration.
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