Strong-Coupling Features in YB_6 and ZrB_{12} Studied by Point-Contact Spectroscopy

• Authors: J. Girovský , P. Szabó , T. Mori , P. Samuely
• Languages of publication: EN

Abstracts

EN

Point-contact spectroscopy studies of the superconducting energy gap and the electron-phonon coupling mechanism are performed on the boron rich YB_6 and ZrB_{12} single crystals. The obtained values of the superconducting energy gaps suggest the strong coupling with 2 Δ/k_{B}T_{c}≈ 4.2 for YB_6 and 2 Δ/k_{B}T_{c}≈ 4.15 for ZrB_{12}. We have observed the dominant soft phonon modes mediating superconductivity in the both samples at energy ≈ 8 meV for YB_6 and ≈ 11 meV in ZrB_{12}, respectively.

Keywords

EN

74.50.+r; 74.70.Ad; 74.62.Dh

Discipline

• 74.50.+r: Tunneling phenomena; Josephson effects(for SQUIDs, see 85.25.Dq; for Josephson devices, see 85.25.Cp; for Josephson junction arrays, see 74.81.Fa)
• 74.62.Dh: Effects of crystal defects, doping and substitution(for specific crystal defects, see 61.72.-y)
• 74.70.Ad: Metals; alloys and binary compounds (including A15, MgB2, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 1042-1044

Dates

published

2010-11

Contributors

author

J. Girovský

• Centre of Low Temperature Physics, IEP Slovak Academy of Sciences & P.J. Šafárik University, Watsonova 47, SK-04353 Košice, Slovakia

author

P. Szabó

• Centre of Low Temperature Physics, IEP Slovak Academy of Sciences & P.J. Šafárik University, Watsonova 47, SK-04353 Košice, Slovakia

author

T. Mori

• Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan

author

P. Samuely

• Centre of Low Temperature Physics, IEP Slovak Academy of Sciences & P.J. Šafárik University, Watsonova 47, SK-04353 Košice, Slovakia

References

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• 8. J. Girovský, P. Szabó, P. Samuely, T. Mori, to be published
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Identifiers

DOI

10.12693/APhysPolA.118.1042