Title :
Energy gaps of Bi-Sr-Ca-Cu-O monocrystal determined by AC-susceptibility
Author :
Nogues, J. ; Skumryev, V. ; Rao, K.V.
Author_Institution :
Dept. of Condensed Matter Phys., R. Inst. of Technol., Stockholm, Sweden
fDate :
11/1/1993 12:00:00 AM
Abstract :
The superconducting energy gap of a Bi2Sr2CaCu2O8+x monocrystal has been determined, both parallel and perpendicular to the a-b plane, from the viscous part of the AC-susceptibility (χ") obtaining values for 2Δ||/kBTc ≈4.8-5.2 and 2Δ2t/kBT c 2.7-3.4. These results are found to be in good agreement with point contact measurements carried out on the same sample and with those published in the literature. These results would appear to support theories proposing two gap superconductivity in these materials
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; magnetic susceptibility; strontium compounds; superconducting energy gap; AC-susceptibility; Bi-Sr-Ca-Cu-O monocrystal; Bi2Sr2CaCu2O8+x; point contact measurements; superconducting energy gap; two gap superconductivity; Critical current; Optical scattering; Physics; Raman scattering; Superconducting microwave devices; Superconducting photodetectors; Superconducting transition temperature; Superconductivity; Surface resistance; Tunneling;
Journal_Title :
Magnetics, IEEE Transactions on
