The first systematic study of the nano-scale periodic local density of states (LDOS) and the inhomogeneous gap distributions for the Pb doped Bi 2 Sr 2 Ca 2 Cu 3 O 10 + y (PbBi2223) microcrystals was carried out using the low-temperature scanning tunneling microscopy/spectroscopy. The spatially inhomogeneous gap distributions with patchy structures of several nm size reveal the average gap magnitude Δ ave ≃ 46 meV with the standard deviation σ = 8 meV. Those features are similar to properties of the widely investigated two-layer Bi-based cuprates. The energy dispersive types of the LDOS modulations are identified as being due to the quasiparticle interference. The relevant scattering vectors seem to testify that the PbBi2223 superconductors are ##IMG## [http://ej.iop.org/images/0953-2048/33/9/095011/sustaba34fieqn1.gif] {$d_{x^2-y^2}$} ones, which was shown earlier to be most pr...

中文翻译：

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STM / STS观察掺Pb的Bi2223铜酸盐超导体中的纳米级周期性结构和间隙分布

使用低温对Pb掺杂的Bi 2 Sr 2 Ca 2 Cu 3 O 10 + y（PbBi2223）微晶进行了纳米级周期性局部态密度（LDOS）和不均匀间隙分布的首次系统研究。扫描隧道显微镜/光谱学。具有数nm大小的斑片结构的空间不均匀间隙分布显示平均间隙幅度Δave≃46 meV，标准偏差σ= 8 meV。这些特征与广泛研究的两层铋基铜酸盐的性质相似。LDOS调制的能量色散类型被识别为是由于准粒子干扰引起的。相关的散射矢量似乎证明了PbBi2223超导体是## IMG ## [http://ej.iop.org/images/0953-2048/33/9/095011/sustaba34fieqn1.gif] {$ d_ {x ^ 2-y ^ 2} $}个，