Physics – Condensed Matter – Superconductivity
Scientific paper
2010-11-19
Phys. Rev. B 83, 184522 (2011)
Physics
Condensed Matter
Superconductivity
6 pages, 5 figures
Scientific paper
A systematic muon-spin-relaxation study in Bi-2201 high-Tc cuprates has revealed for the first time that the Cu-spin correlation (CSC) is developed at low temperatures below 2 K in a wide range of hole concentration where superconductivity appears. The CSC tends to become weak gradually with increasing hole-concentration. Moreover, CSC has been enhanced through the 3% substitution of Zn for Cu. These results are quite similar to those observed in La-214 high-Tc cuprates. Accordingly, it has been suggested that the intimate relation between the so-called spin-charge stripe correlations and superconductivity is a universal feature in hole-doped high-Tc cuprates. Furthermore, apparent development of CSC, which is suppressed through the Zn substitution oppositely, has been observed in non-superconducting heavily overdoped samples, being argued in the context of a recently proposed ferromagnetic state in heavily overdoped cuprates.
Adachi Tadashi
Kawamata Takayuki
Koike Yuji
Suzuki Kaori
Suzuki Toshiya
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