Quadrupolar interactions in heavy fermion metal YbRh2Si2
R.J. Radwanski, Z. Ropka
TL;DR
This paper investigates the quadrupolar interactions in the heavy fermion compound YbRh2Si2, analyzing crystal field effects and their temperature dependence to distinguish between different ground states of Yb3+ ions.
Contribution
It provides a detailed analysis of quadrupolar interactions and their temperature dependence, offering a method to identify the Yb3+ ground state in YbRh2Si2.
Findings
Quadrupolar interactions vary with temperature in YbRh2Si2.
The temperature dependence can distinguish between Gamma_7 and Gamma_6 ground states.
Experimental g tensor values are consistent with crystal field analysis.
Abstract
We describe the experimentally revealed by Sichelschmidt et al, Phys. Rev. Lett. 91 (2003) 156401, g tensor, g_perpendicular=3.561 and g_parallel=0.17, at 5 K by means of crystal field interactions of the 4f13 configuration of the Yb3+ ion of YbRh2Si2 in a slightly orthorhombically distorted tetragonal crystal field. We have shown that the temperature dependence of the quadrupolar interactions Q(T) of the Yb nucleous will help to distinguish between Gamma_7 and Gamma_6 ground state. For the Gamma_7 ground state Q(T) is expected to exhibits an anomalous dependence. Keywords: heavy fermion, crystal field, quadrupolar moment,YbRh2Si2
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