Sn-119-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity

R. Sarkar; F. Brueckner; M. Guenther; Kefeng Wang; C. Petrovic; P. K. Biswas; H. Luetkens; E. Morenzoni; A. Amato; H-H. Klauss

doi:10.1016/j.physb.2015.09.030

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Sn-119-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity

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Sn-119-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity

R. Sarkar, F. Brueckner, M. Guenther, Kefeng Wang, C. Petrovic, P. K. Biswas, H. Luetkens, E. Morenzoni, A. Amato and H-H. Klauss

Physica. B, Condensed matter, Vol.479, pp.51-53

15/12/2015

DOI: https://doi.org/10.1016/j.physb.2015.09.030

Abstract

Physical Sciences

Physics

Physics, Condensed Matter

Science & Technology

We report bulk superconductivity (SC) in Ca3Ir4Sn13 by means of Sn-119 nuclear magnetic resonance (NMR) experiments. Two classical signatures of BCS superconductivity in spin-lattice relaxation rate (1/T-1), namely the Hebel-Slichter coherence peak just below the Tc, and the exponential decay in the superconducting phase, are evident. The noticeable decrease of Sn-119 Knight shift below T-c indicates spinsinglet superconductivity. The temperature dependence of the spin-lattice relaxation rate (119)(1/T-1) is convincingly described by the multigap isotropic superconducting gap. NMR experiments do not witness any sign of enhanced spin fluctuations. (C) 2015 Elsevier B.V. All rights reserved.

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Title: Sn-119-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity
Creators - without role: R. Sarkar - Leibniz Institute for Solid State and Materials Research
F. Brueckner - Tech Univ Dresden, Inst Solid State Phys, D-01069 Dresden, Germany
M. Guenther - Tech Univ Dresden, Inst Solid State Phys, D-01069 Dresden, Germany
Kefeng Wang - Brookhaven National Laboratory
C. Petrovic - Brookhaven National Laboratory
P. K. Biswas - Paul Scherrer Institute
H. Luetkens - Paul Scherrer Institute
E. Morenzoni - Paul Scherrer Institute
A. Amato - Paul Scherrer Institute
H-H. Klauss - Leibniz Institute for Solid State and Materials Research
Publication Details: Physica. B, Condensed matter, Vol.479, pp.51-53
Publisher: Elsevier
Number of pages: 3
Grant note: SA 2426/1-1 / DFG; German Research Foundation (DFG) DE-SC00112704 / US DOE; United States Department of Energy (DOE)
Identifiers: 9924546008331
Academic Unit: Najran University
Language: English
Resource Type: Journal article