TY - JOUR
T1 - Superconducting energy gaps in Bi2Sr2CuO6+y and Bi2Sr2-xNdxCuO6+y
AU - Ekino, Toshikazu
AU - Den, Tohru
AU - Akimitsu, Jun
N1 - Funding Information:
One of the authors (TE) wishes to thank H. Fujii of Hiroshima University. This work was supported by a Grant-in-Aid for Scientific research on Priority areas, "Science of High-To Superconductivity" given by the Ministry of Education, Science and Culture, Japan
PY - 1993/12/15
Y1 - 1993/12/15
N2 - Superconducting energy gaps in Bi2Sr2-xNdxCuO6+y (0≤x≤0.7) with Tc=6.5-20 K have been studied by the electron tunneling technique. The smallest gap value was found at ±2 meV for x=0 with Tc=6.5 K. The obtained gap values almost scale with x and thus Tc throughout the superconducting phase. The ratio 2Δpeak/kBTc=7.1 (2Δ/kBTc=4-5 with Δ from the BCS analysis) for the sample with Tc=6.5 K is still larger than the BCS ratio 3.5 of non-copper oxides (BaPb0.75Bi0.25O3 and Li1+xTi2-xO4) with Tc=11-12 K, indicating a substantial pairing nature difference between them.
AB - Superconducting energy gaps in Bi2Sr2-xNdxCuO6+y (0≤x≤0.7) with Tc=6.5-20 K have been studied by the electron tunneling technique. The smallest gap value was found at ±2 meV for x=0 with Tc=6.5 K. The obtained gap values almost scale with x and thus Tc throughout the superconducting phase. The ratio 2Δpeak/kBTc=7.1 (2Δ/kBTc=4-5 with Δ from the BCS analysis) for the sample with Tc=6.5 K is still larger than the BCS ratio 3.5 of non-copper oxides (BaPb0.75Bi0.25O3 and Li1+xTi2-xO4) with Tc=11-12 K, indicating a substantial pairing nature difference between them.
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U2 - 10.1016/0921-4534(93)90041-N
DO - 10.1016/0921-4534(93)90041-N
M3 - Article
AN - SCOPUS:0027839844
SN - 0921-4534
VL - 218
SP - 387
EP - 395
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3-4
ER -