Disorder induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe$_2$
| Title: | Disorder induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe$_2$ |
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| Authors: | Salis, M. V., Lorenz, J. P., Huang, Y. K., de Visser, A. |
| Source: | Phys. Rev. B 105, 054508 (2022) |
| Publication Year: | 2022 |
| Collection: | Condensed Matter |
| Subject Terms: | Condensed Matter - Superconductivity |
| More Details: | We report a doping study directed to intentionally induce disorder in PdTe$_2$ by the isoelectronic substitution of Pt. Two single-crystalline batches Pd$_{1-x}$Pt$_x$Te$_2$ have been prepared with nominal doping concentrations x = 0.05 and x = 0.10. Sample characterization by energy dispersive x-ray spectroscopy (EDX) revealed Pt did not dissolve homogeneously in the crystals. For the nominal value x = 0.10 small single crystals cut from the batch appeared to have x = 0.09, as well as the non stoichiometric composition Pd$_{0.97}$Pt$_{<0.004}$Te$_{2.03}$. Magnetic and heat capacity measurements demonstrate a transition from type-I to type-II superconducting behavior upon increasing disorder. From transport measurements we calculate a residual resistivity $\rho_0$ = 1.4 $\mu$$\Omega$cm suffices to turn PdTe$_2$ into a superconductor of the second kind. Comment: 7 pages, 5 figures. SM: 6 pages, 3 figures |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevB.105.054508 |
| Access URL: | http://arxiv.org/abs/2201.13363 |
| Accession Number: | edsarx.2201.13363 |
| Database: | arXiv |
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