Superconducting energy gap ofYBa2Cu3O9−δmeasured by far-infrared reflection

1987 ◽  
Vol 36 (16) ◽  
pp. 8802-8803 ◽  
Author(s):  
Hong-juan Ye ◽  
Wei Lu ◽  
Zhi-yi Yu ◽  
Xue-chu Shen ◽  
Bai-cai Miao ◽  
...  
Keyword(s):  
Energy Gap ◽  
Far Infrared ◽  
Infrared Reflection ◽  
Superconducting Energy Gap

Far infrared reflection measurement of the energy gap of YBa 2 Cu 3 O 9-δ

1988 ◽  
Vol 5 (4) ◽  
pp. 161-164 ◽  
Author(s):  
Ye Hongjuan ◽  
Lu Wei ◽  
Yu Zhiyi ◽  
Shen Xuechu (S C Shen) ◽  
Miao Baicai ◽  
...  
Keyword(s):  
Energy Gap ◽  
Far Infrared ◽  
Reflection Measurement ◽  
Infrared Reflection

Superconducting energy gap of NbS2

1984 ◽  
Vol 62 (8) ◽  
pp. 776-779 ◽  
Author(s):  
R. J. Kennedy ◽  
B. P. Clayman
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Temperature ◽  
Energy Gap ◽  
Far Infrared ◽  
The Novel ◽  
Superconducting Transition ◽  
Small Particles ◽  
Energy Gaps ◽  
Superconducting Energy Gap ◽  
Novel Method

The superconducting energy gaps of small particles (1–10 μm) of 2H–NbS2 and 2H–NbSe2 have been measured by far-infrared (FIR) transmission spectroscopy. Comparison of these results with previous FIR measurements made on millimetre-size single crystals of 2H–NbSe2 validates the use of the novel method of sample preparation used here. Comparison of the gap frequencies (νg) with the superconducting transition temperature (Tc) determined by magnetic susceptibility measurements indicates that 2H–NbS2, unlike 2H–NbSe2, exhibits non-Bardeen–Cooper–Schrieffer (BCS)-like behaviour, with hνg/kTc = 2.3.

Anisotropy in the Superconducting Energy Gap of NbSe2

1972 ◽  
Vol 50 (24) ◽  
pp. 3193-3197 ◽  
Author(s):  
B. P. Clayman
Keyword(s):  
Single Crystals ◽  
Transmission Spectrum ◽  
Energy Gap ◽  
Layer Structure ◽  
Far Infrared ◽  
Infrared Transmission ◽  
Superconducting Energy Gap ◽  
Infrared Transmission Spectrum

The superconducting energy gap in single crystals of NbSe2, a layer structure, has been determined to be anisotropic by measuring the far-infrared transmission spectrum. The gap for electron velocities in the layers is [Formula: see text] and for velocities perpendicular to the layers is [Formula: see text]. These results are compared with recent tunneling experiments.

Determination of the energy gap in YBa2Cu3O7−δ by tunneling, far infrared reflection and andreev reflection

1988 ◽  
Vol 153-155 ◽  
pp. 1718-1723 ◽  
Author(s):  
P.J.M. Van Bentum ◽  
H.F.C. Hoevers ◽  
H. Van Kempen ◽  
L.E.C. Van De Leemput ◽  
M.J.M.F. de Nivelle ◽  
...  
Keyword(s):  
Andreev Reflection ◽  
Energy Gap ◽  
Far Infrared ◽  
Infrared Reflection

INFRARED REFLECTION IN Bi(Pb)-Sr-Ca-Cu-O SUPERCONDUCTING CERAMIC SAMPLES OF MIXED 2212 AND 2223 PHASES

1991 ◽  
Vol 05 (05) ◽  
pp. 375-380
Author(s):  
J, Q. LIU ◽  
Y.S. HE ◽  
M. REVAULT ◽  
J.P. FORGERIT
Keyword(s):  
Energy Gap ◽  
Ceramic Samples ◽  
Infrared Reflection ◽  
Superconducting Energy Gap ◽  
Ir Reflectance ◽  
Reflectance Measurements ◽  
Superconducting Ceramic ◽  
Bcs Superconductors

Investigations of superconducting energy gap with IR reflectance measurements above and below Tc have been performed in Bi(Pb)-Sr-Ca-Cu-O ceramic samples of mixed 2212 and 2223 phases. The failure to get the two gap’s values simultaneously in the same sample from the maxima in the Rs/Rn curve and a comparison between our results and those obtained previously by other authors for YBaCuO compounds showed the insensitivity of these maxima to Tc in high-Tc superconductors. This means that it might be difficult to deduce the gap’s value directly from the Rs/Rn curve as has been done in conventional BCS superconductors.

Far infrared evidence: The real part of the optical conductivity below the superconducting energy gap of BiSrCaCuO thin films

1991 ◽  
Vol 185-189 ◽  
pp. 953-954 ◽  
Author(s):  
Masayuki Sato ◽  
Keigo Nagasaka ◽  
Masaru Ihara ◽  
Takafumi Kimura ◽  
Hiroshi Nakao
Keyword(s):  
Thin Films ◽  
Optical Conductivity ◽  
Energy Gap ◽  
Far Infrared ◽  
The Real ◽  
Superconducting Energy Gap
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