A REVIEW OF THE SIZE OF THE ENERGY-GAP IN SUPERCONDUCTING OXIDES

被引：21
作者：
HIRATA, T
ASADA, Y
机构：
[1] National Research Institute for Metals, Tokyo, 153, 2-3-12, Nakameguro, Meguro-ku
来源：
JOURNAL OF SUPERCONDUCTIVITY | 1991年 / 4卷 / 02期
关键词：
ENERGY GAP; GAP ANISOTROPY; WEAK COUPLING BCS PREDICTION; STRONG COUPLING; FAR INFRARED;
D O I：
10.1007/BF00617723
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
An attempt has been made to summarize a large body of data dealing with measurements of the energy gap in superconducting oxides like La(2-x)Sr(x)CuO4-y, YBa2Cu3O7-y, and related compounds. A plot of available data of the energy gap 2-DELTA as a function of the superconducting transition temperature T(c) revealed a large "dispersion" of some data from 2-DELTA/k(B)T(c) = 3.53 for the weak coupling BCS prediction. Nevertheless, we could conclude that the size of the energy gap in these exotic materials is within the weak coupling BCS prediction, in view of some controversial issues that could be responsible for the dispersion, such as the gap anisotropy as well as identification of the energy gap.
引用
收藏
页码：171 / 177
页数：7
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共 71 条
  • [1] Poole C.P., Datta T., Farach H.A., Cooper Oxide Superconductors, (1988)
  • [2] Bourne L.C., Crommie M.F., Zettl A., zur Loye H.-L., Keller S.W., Leary K.L., Stacy A.M., Chang K.J., Cohen M.L., Morris D.E., Phys. Lev. Lett., 58, (1987)
  • [3] Falens T.A., Ham W.K., Keller S.W., Leary K.J., Michaels J.N., Stacey A.M., zur Loye H.-C., Morris D.E., Barbe T.W., Bourne L.C., Cohen M.L., Hoen S., Zettl A., Observation of an oxygen isotope shift in the superconducting transition temperature ofLa1.85Sr0.15CuO4, Physical Review Letters, 59, (1987)
  • [4] Phillips J.C., Solid State Commun., 65, (1988)
  • [5] Phillips J.C., Phys. Rev. B, 36, (1987)
  • [6] Schlesinger Z., Collins R.T., Scott B.A., Calise J.A., Phys. Rev. B, 38, (1988)
  • [7] Wang S.H., Song Q., Clayman B.P., Peng J.L., Zhang L., Shelton R.N., Phys. Rev. Lett., 64, (1990)
  • [8] Shirane G., Birgeneau R.J., Endoh Y., Gehring P., Kastner M.A., Kitazawa K., Kojima H., Tanaka I., Thurston T.R., Yamda K., Phys. Rev. Lett., 63, (1989)
  • [9] Sherwin M.S., Richards P.L., Zettl A., Phys. Rev. B, 37, (1988)
  • [10] Sulewski P.E., Noh T.W., McWhirter J.T., Sievers A.J., Phys. Rev. B, 36, (1987)
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