Clear distinction between the underdoped and overdoped regime in the Tc suppression of Cu-site-substituted high-Tc cuprates.
Clear distinction between the underdoped and overdoped regime in the Tc suppression of Cu-site-substituted high-Tc cuprates.
复制标题
在铜位取代的高 Tc 铜酸盐的 Tc 抑制中，欠掺杂和过度掺杂状态之间存在明显区别。
DOI：
10.1103/physrevb.52.r727
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Saito
中科院分区：
文献类型：
--
作者：
Kluge;Koike;Fujiwara;Kato;Noji;Saito
The ${\mathit{T}}_{\mathit{c}}$ suppression by Cu-site substitution has been studied in a wide range of carrier concentrations p, from the underdoped regime to the overdoped regime, using sintered polycrystals of ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{Ca}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Y}}_{\mathit{x}}$(${\mathrm{Cu}}_{1\mathrm{\ensuremath{-}}\mathit{z}}$${\mathit{M}}_{\mathit{z}}$${)}_{2}$${\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ with x=0 and x=0.3 and under variation of \ensuremath{\delta}. The carrier-dependent strength of the ${\mathit{T}}_{\mathit{c}}$ suppression by substituting M=Fe, Co, Ni, Zn for Cu is measured. In the overdoped regime, we find ${\mathit{T}}_{\mathit{c}}$ scaling as ${\mathit{T}}_{\mathit{c}}$(p,z)/${\mathit{T}}_{\mathit{c}}$(p,0)=g(z) with a p-independent function g(z), whereas in the underdoped regime ${\mathit{T}}_{\mathit{c}}$(p,z)/${\mathit{T}}_{\mathit{c}}$(p,0) is strongly p dependent. Replotting data of various publications on the ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{CuO}}_{4}$ system and comparison with the ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ system demonstrate the universality of this distinction between the two regimes in p-type high-${\mathit{T}}_{\mathit{c}}$ cuprates. The scaling behavior is discussed with respect to Born-limit and unitarity-limit scattering.
