Disorder-induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe2

M. V. Salis; J. P. Lorenz; Y. K. Huang; A. de Visser

doi:10.1103/PhysRevB.105.054508

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Disorder-induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe2

M. V. Salis, J. P. Lorenz, Y. K. Huang, A. de Visser

DOI 10.1103/PhysRevB.105.054508 · Physical Review B

T1

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Abstract

We report a doping study directed to intentionally induce disorder in PdTe2 by the isoelectronic substitution of Pt. Two single-crystalline batches Pd1−xPtxTe2 have been prepared with nominal doping concentrations x=0.05 and x=0.10. Sample characterization by energy dispersive x-ray spectroscopy 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 nonstoichiometric composition Pd0.97Pt<0.004Te2.03. 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 ρ0=1.4μΩcm suffices to turn PdTe2 into a superconductor of the second kind.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.7	Pressure not reported	unknown
Au1-xPdxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4	Pressure not reported	unknown
CuxPdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.6	Pressure not reported	unknown
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.87	Pressure not reported	onset
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.56	Pressure not reported	onset
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.85	Pressure not reported	onset
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.64	Pressure not reported	onset
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.75	Pressure not reported	onset
PdTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.62	Pressure not reported	onset
Pd0.91Pt0.09Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.44	Pressure not reported	onset
Pd0.97Pt<0.004Te2.03 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.91	Pressure not reported	onset
Pd0.97Pt<0.004Te2.03 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.6	Pressure not reported	onset