TY - JOUR
T1 - Tunneling and magnetic characteristics of superconducting ZrB12 single crystals
AU - Tsindlekht, M. I.
AU - Leviev, G. I.
AU - Asulin, I.
AU - Sharoni, A.
AU - Millo, O.
AU - Felner, I.
AU - Paderno, Yu B.
AU - Filippov, V. B.
AU - Belogolovskii, M. A.
PY - 2004/6
Y1 - 2004/6
N2 - Bulk and surface properties of high-quality single crystals of zirconium dodecaboride have been studied in the temperature range from 4.5 K up to the superconducting transition temperature, which is found to be nearly 6.06 K. Scanning tunneling spectroscopy data, together with dc and ac magnetization measurements, are consistent with the conventional s-wave pairing scenario, whereas they disagree in estimates of the electronphonon coupling strength. We explain the divergence, supposing a great difference between the surface and bulk superconducting characteristics of the compound. This assertion is supported by our findings of a non-linear magnetic response to an amplitude-modulated alternating magnetic field, testifying to the presence of surface superconductivity in the ZrB12 samples at dc fields exceeding the thermodynamic critical field.
AB - Bulk and surface properties of high-quality single crystals of zirconium dodecaboride have been studied in the temperature range from 4.5 K up to the superconducting transition temperature, which is found to be nearly 6.06 K. Scanning tunneling spectroscopy data, together with dc and ac magnetization measurements, are consistent with the conventional s-wave pairing scenario, whereas they disagree in estimates of the electronphonon coupling strength. We explain the divergence, supposing a great difference between the surface and bulk superconducting characteristics of the compound. This assertion is supported by our findings of a non-linear magnetic response to an amplitude-modulated alternating magnetic field, testifying to the presence of surface superconductivity in the ZrB12 samples at dc fields exceeding the thermodynamic critical field.
UR - http://www.scopus.com/inward/record.url?scp=42749106595&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.69.212508
DO - 10.1103/PhysRevB.69.212508
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AN - SCOPUS:42749106595
SN - 0163-1829
VL - 69
SP - 212508-1-212508-4
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 212508
ER -