Microscopic investigation of the superconducting properties of the strongly coupled superconductor IrGe via μSR

Arushi; Kapil Motla; P. K. Meena; S. Sharma; D. Singh; P. K. Biswas; A. D. Hillier; R. P. Singh

doi:10.1103/PhysRevB.105.054517

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Microscopic investigation of the superconducting properties of the strongly coupled superconductor IrGe via μSR

Arushi, Kapil Motla, P. K. Meena, S. Sharma, D. Singh, P. K. Biswas, A. D. Hillier, R. P. Singh

DOI 10.1103/PhysRevB.105.054517 · Physical Review B

T1

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Abstract

Exploring superconductors which can possess a pairing mechanism other than the BCS predicted s wave have continually attracted considerable interest. Superconductors with low-lying phonons may exhibit unconventional superconductivity as the coupling of electrons with these low-lying phonons can potentially affect the nature of the superconducting ground state, resulting in strongly coupled superconductivity. In this work, by using magnetization, AC transport, specific heat, and muon spin rotation/relaxation (μSR) measurements, we report a detailed investigation on the superconducting ground state of the strongly coupled superconductor, IrGe, that has a transition temperature, TC, at 4.7 K. Specific heat (SH), and transverse field μSR is best described with an isotropic s-wave model with strong electron-phonon coupling, indicated by the values of both Δ(0)/kBTC=2.3,2.1 (SH,μSR), and ΔCel/γnTC=2.7. Zero-field μSR measurements confirm the presence of time-reversal symmetry in the superconducting state of IrGe.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
IrGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.7	Pressure not reported	onset
IrGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.6	Pressure not reported	zero_resistance
IrGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.74	Pressure not reported	onset
IrGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.6	Pressure not reported	midpoint
IrGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.7	Pressure not reported	unknown
RbOs2O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
KOs2O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
SrPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb5Ir3O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown