TY - JOUR
T1 - NMR study of high-TC superconductors
AU - Asayama, K.
AU - Kitaoka, Y.
AU - Zheng, G. Q.
AU - Ishida, K.
AU - Magishi, K.
N1 - Funding Information:
The authorsw ish to expresst heir thankst o K. Yoshida and K. Hanzawafo r their valuabled iscus-sion on vQ. This work was partly supportedb y a Grant-in-Aid for Scientific Researcho n Priority Areas "Mechanismo f Superconductivitfyr"o m the Ministry of EducationS, ciencea nd Culture.
PY - 1996/6/2
Y1 - 1996/6/2
N2 - Recent NMR study of high-TC superconductors carried out by Osaka group is reviewed. NQR frequency vQ, Knight shift K, T1 of 63Cu and 17O were measured over a wide hole doping range from light-to heavy-doped systems, LSCO, YBCO, HBCCO, BSCCO, TBCCO and TBCO, together with impurity and pressure effect. By analysing vQ, K and T1, the local hole numbers of Cu and O at the CuO2 plane, n(Cu) and n(O) the relative magnitude of the uniform susceptibility, χ0 and the low-frequency component of the antiferromagnetic spin fluctuations (AFSF), χQ/Γ (χQ is the staggered susceptibility and Γ is the characteristic energy of the spin fluctuation at q = 0) are obtained. The relation between n(Cu), n(O) and χQ, χQ/Γ, TC, etc. were discussed. There are optimum values of n(Cu)/2n(O) and n(Cu) + 2n(O) to give maximum TC. The NMR results in the superconducting state are well-explained by d-wave pairing model. The result is consistent with the AFSF mediated superconducting model.
AB - Recent NMR study of high-TC superconductors carried out by Osaka group is reviewed. NQR frequency vQ, Knight shift K, T1 of 63Cu and 17O were measured over a wide hole doping range from light-to heavy-doped systems, LSCO, YBCO, HBCCO, BSCCO, TBCCO and TBCO, together with impurity and pressure effect. By analysing vQ, K and T1, the local hole numbers of Cu and O at the CuO2 plane, n(Cu) and n(O) the relative magnitude of the uniform susceptibility, χ0 and the low-frequency component of the antiferromagnetic spin fluctuations (AFSF), χQ/Γ (χQ is the staggered susceptibility and Γ is the characteristic energy of the spin fluctuation at q = 0) are obtained. The relation between n(Cu), n(O) and χQ, χQ/Γ, TC, etc. were discussed. There are optimum values of n(Cu)/2n(O) and n(Cu) + 2n(O) to give maximum TC. The NMR results in the superconducting state are well-explained by d-wave pairing model. The result is consistent with the AFSF mediated superconducting model.
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U2 - 10.1016/0921-4526(96)00153-6
DO - 10.1016/0921-4526(96)00153-6
M3 - Article
AN - SCOPUS:4243641672
SN - 0921-4526
VL - 223-224
SP - 478
EP - 483
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-4
ER -