Anisotropic Dependence of Superconductivity on Uniaxial Pressure in CeIrIn5
O.M. Dix, A.G. Swartz, R.J. Zieve, J. Cooley, T.R. Sayles, M.B. Maple
TL;DR
This study investigates how uniaxial pressure along different crystal axes affects the superconducting transition temperature in CeIrIn5, revealing anisotropic effects linked to geometric and hybridization factors.
Contribution
It provides the first detailed measurement of uniaxial pressure effects on Tc in CeIrIn5 and separates geometric influences from hybridization effects.
Findings
Tc increases linearly with a-axis pressure
Tc decreases linearly with c-axis pressure
The geometric influence on Tc is quantified as dTc/d(c/a)=44 K
Abstract
We measure the effect of uniaxial pressure on the superconducting transition temperature Tc in CeIrIn5. We find a linear change in Tc with both a-axis and c-axis pressure, with slopes of 56 mK/kbar and -66 mK/kbar, respectively. By comparing results from doping studies and different types of pressure measurements, we separate the influences of hybridization and dimensionality on Tc. We find the true geometric influence, for constant hybridization, is dTc/d(c/a)=44 K.
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