Impact of Ni doping on critical parameters of PdTe superconductor

Abstract

We report the effect of Ni doping on superconductivity of PdTe. The superconducting parameters like critical temperature (T c ), upper critical field (H c2 ) and normalized specific-heat

First-principles study of the electronic properties of Pd1−xNixTe alloys

“…It means that PdTe and all of its Pd 1−x Ni x Te alloys (for x=0.01-0.20) are non-magnetic. This is consistent with the experimental results [9]. It is worth mentioning that the Fe doping in PdTe leads to a very rich phase diagram where ferromagnetism coexists with short-range antiferromagnetism and superconductivity [41].…”

“…Figure 6 shows the calculated DOS for Pd 1−x Ni x Te alloys. For x=0.01, the DOS is almost unchanged consistent with the fact that T c is nearly unchanged for Pd 0.99 Ni 0.01 Te [9]. For x>0.01, the density of states show a very strong redistribution of spectral weights with increasing Ni concentration (x).…”

“…PdTe is a paramagnetic metal and the charge transport is dominated by electrons as confirmed by the sign of Seebeck and Hall coefficients [1,36]. Initially, PdTe was predicted to be a strongly coupled BCS superconductor withT 4.5 K c [1], but later it was found to be a moderately coupled BCS type superconductor [3][4][5][6]9]. The Pd 4d and Te 5p orbitals contribute almost equally to the density of states at the Fermi energy N(E F ).…”

“…Recently, PdTe a palladium-based transition metal chalcogenide has attracted the attention of experimentalists and theorists alike [1][2][3][4][5][6][7][8][9]. This has been partly motivated by the extensive research on iron chalcogenides [10][11][12][13][14][15][16][17][18][19], ferromagnetic instability of palladium [20,21], exotic topological superconductivity in PdTe 2 [22][23][24] and the expectations that the study of PdTe and its alloys may shed some light on the nature of superconductivity in FeSe and related superconductors.…”

“…This is generally attributed to the magnetic nature of iron, but it is also possible that the superconductivity in PdTe is not purely s-wave, as speculated in [4]. Very recently, Reena et al [9] have studied the effects of Pd substitution with Ni in PdTe. The results are very interesting and demand for further investigations.…”