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

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3598

Lastpage

3600

Abstract

The superconducting energy gap of a Bi₂Sr₂CaCu₂O_8+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_||/k_BT_c≈4.8-5.2 and 2Δ_2t/k_BT _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; Bi₂Sr₂CaCu₂O_8+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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281242

Filename

281242