Coherent quasiparticle weight and its connection to high-T(c) superconductivity from angle-resolved photoemission.
Coherent quasiparticle weight and its connection to high-T(c) superconductivity from angle-resolved photoemission.
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DOI：
10.1103/physrevlett.87.227001
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发表时间：
2000-06
影响因子：
8.6
通讯作者：
H. Ding;J. Engelbrecht;Z. Wang;J. Campuzano;S.-C. Wang;H.-B. Yang;R. Rogan;T. Takahashi;
中科院分区：
文献类型：
--
作者：
H. Ding;J. Engelbrecht;Z. Wang;J. Campuzano;S.-C. Wang;H.-B. Yang;R. Rogan;T. Takahashi;
我们使用角分辨光电子研究了高 T(c) 超导体 Bi(2)Sr(2)CaCu(2)O(8+x) 的单粒子相干重量 z(A) 的掺杂和温度依赖性。我们发现，在低温下，(pi,0) 处的相干权重 z(A) 与载流子浓度 x 成正比，并且 z(A) 的温度依赖性与 c 轴超流体密度的温度依赖性相似。我们表明，对于较宽的载流子浓度范围，超导转变温度与低温相干重量和最大超导能隙的乘积成比例。
We study the doping and temperature dependence of the single-particle coherent weight, z(A), for high- T(c) superconductors Bi(2)Sr(2)CaCu(2)O(8+x) using angle-resolved photoemission. We find that at low temperatures the coherent weight z(A) at (pi,0) is proportional to the carrier concentration x and that the temperature dependence of z(A) is similar to that of the c-axis superfluid density. We show that, for a wide range of carrier concentration, the superconducting transition temperature scales with the product of the low-temperature coherent weight and the maximum superconducting gap.