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Comparative study of the centrosymmetric and noncentrosymmetric superconducting phases of Re_{3}W using muon spin spectroscopy and heat capacity measurements
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Biswas, P. K. (Pabitra K.), Hillier, A., Lees, Martin R. and Paul, Don McK. (2012) Comparative study of the centrosymmetric and noncentrosymmetric superconducting phases of Re_{3}W using muon spin spectroscopy and heat capacity measurements. Physical Review B (Condensed Matter and Materials Physics), Vol.85 (No.13). p. 134505. doi:10.1103/PhysRevB.85.134505 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.85.134505
Abstract
We compare the low-temperature electronic properties of the centrosymmetric (CS) and noncentrosymmetric (NCS) phases of Re 3W using muon-spin spectroscopy and heat capacity measurements. The zero-field μSR results indicate that time-reversal symmetry is preserved for both structures of Re 3W. Transverse-field muon-spin rotation has been used to study the temperature dependence of the penetration depth λ(T) in the mixed state. For both phases of Re 3W, λ(T) can be explained using a single-gap s-wave BCS model. The magnetic penetration depth at zero temperature λ(0) is 164(7) and 418(6) nm for the centrosymmetric and noncentrosymmetric phases of Re 3W, respectively. Low-temperature- specific heat data also provide evidence for an s-wave gap symmetry for the two phases of Re 3W. Both the μSR and heat capacity data show that the CS material has a higher T c and a larger superconducting gap Δ(0) at 0 K than the NCS compound. The ratio Δ(0)/k BT c indicates that both phases of Re 3W should be considered as strong-coupling superconductors. © 2012 American Physical Society.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1098-0121 | ||||
Official Date: | 6 April 2012 | ||||
Dates: |
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Volume: | Vol.85 | ||||
Number: | No.13 | ||||
Page Range: | p. 134505 | ||||
DOI: | 10.1103/PhysRevB.85.134505 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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