Year: 2018
Type: article
Abstract: We report thermoelectric properties of ${\mathrm{Ir}}_{1\ensuremath{-}x}{\mathrm{Rh}}_{x}{\mathrm{Te}}_{2}$ ($0\ensuremath{\le}x\ensuremath{\le}0.3$) alloy series where superconductivity at low temperatures emerges as the high-temperature structural transition (${T}_{s}$) is suppressed. The isovalent ionic substitution of Rh into Ir has different effects on physical properties when compared to the anionic substitution of Se into Te, in which the structural transition is more stable with Se substitution. Rh substitution results in a slight reduction of lattice parameters and in an increase of number of carriers per unit cell. Weak-coupled BCS superconductivity in ${\mathrm{Ir}}_{0.8}{\mathrm{Rh}}_{0.2}{\mathrm{Te}}_{2}$ that emerges at low temperature (${T}_{c}^{\mathrm{zero}}=2.45\phantom{\rule{0.28em}{0ex}}\mathrm{K}$) is most likely driven by electron-phonon coupling rather than dimer fluctuations mediated pairing.
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G241279073, G6226312874
OpenAlex ID: W2892850124