Point-Contact Spectroscopy of Superconducting MgCNi_3 Single Crystals

• Authors: Z. Pribulová , P. Szabó , J. Kačmarčík , P. Samuely , D. Jang , H. Lee , H. Lee , S. Lee
• Languages of publication: EN

Abstracts

EN

The first point-contact spectroscopy measurements on MgCNi_3 single crystals of very good quality are presented. The measurements have been performed in the temperature range from 1.5 K up to 10 K and at magnetic fields up to 6 T. The superconducting energy gap Δ of the system is found to be scattered between 1 and 1.2 meV which gives the 2Δ/k T_c ratio between BCS weak-coupling value of ~3.5 and a strong coupling of about 4.2. The excess current evaluated in magnetic field indicates the presence of a single energy gap.

Keywords

EN

74.50.+r

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)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 215-218

Dates

published

2008-01

received

2007-07-09

Contributors

author

Z. Pribulová

• Centre of Low Temperature Physics (CLTP) IEP SAS & FS UPJŠ, Watsonova 47, 040 01 Košice, Slovakia

author

P. Szabó

• Centre of Low Temperature Physics (CLTP) IEP SAS & FS UPJŠ, Watsonova 47, 040 01 Košice, Slovakia

author

J. Kačmarčík

• Centre of Low Temperature Physics (CLTP) IEP SAS & FS UPJŠ, Watsonova 47, 040 01 Košice, Slovakia

author

P. Samuely

• Centre of Low Temperature Physics (CLTP) IEP SAS & FS UPJŠ, Watsonova 47, 040 01 Košice, Slovakia

author

D. Jang

• NCRICS and Department of Physics, Pohang University of Science and, Technology, Pohang 790-784, Republic of Korea

author

H. Lee

• NCRICS and Department of Physics, Pohang University of Science and, Technology, Pohang 790-784, Republic of Korea

author

H. Lee

• NCRICS and Department of Physics, Pohang University of Science and, Technology, Pohang 790-784, Republic of Korea

author

S. Lee

• NCRICS and Department of Physics, Pohang University of Science and, Technology, Pohang 790-784, Republic of Korea

References

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Identifiers

DOI

10.12693/APhysPolA.113.215