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

Abstract

In this study, we report bulk superconductivity (SC) in Ca3Ir4Sn13 by means of 119Sn nuclear magnetic resonance (NMR) experiments. Two classical signatures of BCS superconductivity in spin-lattice relaxation rate (1/T1), namely the Hebel–Slichter coherence peak just below the Tc, and the exponential decay in the superconducting phase, are evident. The noticeable decrease of 119Sn Knight shift below Tc indicates spin-singlet superconductivity. The temperature dependence of the spin-lattice relaxation rate 119(1/T1) is convincingly described by the multigap isotropic superconducting gap. NMR experiments do not witness any sign of enhanced spin fluctuations.

Authors:
 [1];  [2];  [1];  [1];  [2];  [3];  [3];  [3];  [3];  [1]
  1. TU Dresden, Dresden (Germany). Institute for Solid State Physics.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1235863
Alternate Identifier(s):
OSTI ID: 1249624
Report Number(s):
BNL-111655-2015-JA
Journal ID: ISSN 0921-4526; R&D Project: PM016; KC0201050
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Physica. B, Condensed Matter
Additional Journal Information:
Journal Volume: 479; Journal Issue: C; Journal ID: ISSN 0921-4526
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; NMR; BCS superconductivity; multigap

Citation Formats

Sarkar, R., Petrovic, C., Bruckner, F., Gunther, M., Wang, Kefeng, Biswas, P. K., Luetkens, H., Morenzoni, E., Amato, A., and Klauss, H. -H. 119Sn-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity. United States: N. p., 2015. Web. doi:10.1016/j.physb.2015.09.030.
Sarkar, R., Petrovic, C., Bruckner, F., Gunther, M., Wang, Kefeng, Biswas, P. K., Luetkens, H., Morenzoni, E., Amato, A., & Klauss, H. -H. 119Sn-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity. United States. doi:10.1016/j.physb.2015.09.030.
Sarkar, R., Petrovic, C., Bruckner, F., Gunther, M., Wang, Kefeng, Biswas, P. K., Luetkens, H., Morenzoni, E., Amato, A., and Klauss, H. -H. Fri . "119Sn-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity". United States. doi:10.1016/j.physb.2015.09.030. https://www.osti.gov/servlets/purl/1235863.
@article{osti_1235863,
title = {119Sn-NMR investigations on superconducting Ca3Ir4Sn13: Evidence for multigap superconductivity},
author = {Sarkar, R. and Petrovic, C. and Bruckner, F. and Gunther, M. and Wang, Kefeng and Biswas, P. K. and Luetkens, H. and Morenzoni, E. and Amato, A. and Klauss, H. -H.},
abstractNote = {In this study, we report bulk superconductivity (SC) in Ca3Ir4Sn13 by means of 119Sn nuclear magnetic resonance (NMR) experiments. Two classical signatures of BCS superconductivity in spin-lattice relaxation rate (1/T1), namely the Hebel–Slichter coherence peak just below the Tc, and the exponential decay in the superconducting phase, are evident. The noticeable decrease of 119Sn Knight shift below Tc indicates spin-singlet superconductivity. The temperature dependence of the spin-lattice relaxation rate 119(1/T1) is convincingly described by the multigap isotropic superconducting gap. NMR experiments do not witness any sign of enhanced spin fluctuations.},
doi = {10.1016/j.physb.2015.09.030},
journal = {Physica. B, Condensed Matter},
number = C,
volume = 479,
place = {United States},
year = {2015},
month = {9}
}

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Works referencing / citing this record:

Vortex phase diagram study in the superconductor Ca 3 Ir 4 Sn 13
journal, August 2018

  • Kumar, Santosh; Singh, Ravi P.; Thamizhavel, A.
  • Materials Research Express, Vol. 5, Issue 10
  • DOI: 10.1088/2053-1591/aad99b

Vortex phase diagram study in the superconductor Ca 3 Ir 4 Sn 13
journal, August 2018

  • Kumar, Santosh; Singh, Ravi P.; Thamizhavel, A.
  • Materials Research Express, Vol. 5, Issue 10
  • DOI: 10.1088/2053-1591/aad99b