Isotropic single-gap superconductivity of elemental Pb

Khasanov, R.; Das, Debarchan; Gawryluk, D. J.; Gupta, Ritu; Mielke, C. H.

doi:10.1103/physrevb.104.l100508

Cited by 6 publications

(3 citation statements)

References 49 publications

(74 reference statements)

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“…3(b)). With SOC, the signature of this anisotropy, however, reduces which may explain why some experiments are not able to observe the two-band superconductivity of Pb, 44 whereas it is visible in other experiments. 46,47 We embedded the 3d series of transition metal (TM) atoms as substitutional defects in bulk Pb.…”

Section: Soc-induced Splitting Of Yu-shiba-rusinov Statesmentioning

confidence: 96%

“…The coupling constant λ is set such that the superconducting gap of bulk Pb reproduces the experimental value of ∆ ≈ 1.4 meV. 30,44 This value of λ is then kept constant in the subsequent CPA calculations that include transition metal impurities in Pb. Both in the calculations for impurity embedding and within the CPA, we set λ to zero on the impurity site.…”

Section: Computational Detailsmentioning

confidence: 99%

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Density-functional description of materials for topological qubits and superconducting spintronics

Rüßmann,

Antognini Silva,

Hemmati

et al. 2023

Spintronics XVI

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Interfacing superconductors with magnetic or topological materials offers a playground where novel phenomena like topological superconductivity, Majorana zero modes, or superconducting spintronics are emerging. In this work, we discuss recent developments in the Kohn-Sham Bogoliubov-de Gennes method, which allows to perform material-specific simulations of complex superconducting heterostructures on the basis of density functional theory. As a model system we study magnetically-doped Pb. In our analysis we focus on the interplay of magnetism and superconductivity. This combination leads to Yu-Shiba-Rusinov (YSR) in-gap bound states at magnetic defects and the breakdown of superconductivity at larger impurity concentrations. Moreover, the influence of spin-orbit coupling and on orbital splitting of YSR states as well as the appearance of a triplet component in the order parameter is discussed. These effects can be exploited in S/F/S-type devices (S=superconductor, F=ferromagnet) in the field of superconducting spintronics.

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Section: Soc-induced Splitting Of Yu-shiba-rusinov Statesmentioning

confidence: 96%

Section: Computational Detailsmentioning

confidence: 99%

Density-functional description of materials for topological qubits and superconducting spintronics

Rüßmann,

Antognini Silva,

Hemmati

et al. 2023

Spintronics XVI

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“…The experimental data were analyzed by separating the TF-µSR response of the sample and the background contributions by following the procedure described in Refs. [29][30][31][32][33]. The magnetic field distribution in a type-I superconductor, as elemental Indium, in the intermediate state, consists of two sharp peaks corresponding to the response of the domains remaining in the Meissner state (B ≡ 0) and in the normal state (B ≡ B c > B ex , B c is the thermodynamic critical field), see Fig.…”

Section: Muon-spin Rotation/relaxation Experimentsmentioning

confidence: 99%

Three-wall piston-cylinder type pressure cell for muon-spin rotation/relaxation experiments

Khasanov,

Urquhart,

Elender

et al. 2021

Preprint

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A three-wall piston-cylinder type high pressure cell for muon-spin rotation/relaxation experiments was designed, manufactured, tested and commissioned. The outer cylinder of the cell body is made from MP35N and the middle and the inner cylinders are made from NiCrAl nonmagnetic alloys. The mechanical design and performance of the pressure cell are evaluated and optimised using finite-element analysis. The outcomes of the experimental testing closely match the modelling results. The high-pressure cell is shown to reach pressures of up to 3.3 GPa at ambient temperature, corresponding to 3.0 GPa at low temperatures, without irreversible damage.

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